DoctorsProofNPPES directory · verify at state boards

Doctors in Panorama City, CA

455 physicians listed in the NPPES public registry. Page 3 of 8.

NPPES tenure ≠ clinical experience. "Years on NPPES" is time since the physician first registered a National Provider Identifier, not time practicing medicine. Verify current license status with the state medical board.

Verify a license at the Medical Board of California

Dr. Shalesh Gupta, MD

Obstetrics & Gynecology

20 yrs NPPES
NPI 1578630596
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Atsuko Haruyama, MD

Obstetrics & Gynecology

20 yrs NPPES
NPI 1699842518
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Susannah Mason, MD

Internal Medicine

20 yrs NPPES
NPI 1174690002
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Timothy Leifer, DO

Family Medicine

20 yrs NPPES
NPI 1952478802
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Ziad Eskandar, MD

Internal Medicine

20 yrs NPPES
NPI 1033286968
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· $57.14 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$57.14

Total received

1

Transactions

1

Paying companies

Top paying companies

ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)$57.14

Among the 183,896 internal medicine doctors we've analyzed, about 37% received any industry payment (median $195 among those who did). This doctor's total ranks around the 72th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US internal medicine doctors.

Payments to Ziad Eskandar do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Warren Wythe, MD

Physical Medicine & Rehabilitation

20 yrs NPPES
NPI 1285701110
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Peter Jacob, MD

Obstetrics & Gynecology

20 yrs NPPES
NPI 1295802148
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Philip Tuso, MD

Nephrology

20 yrs NPPES
NPI 1356418214
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Kathleen Yamaguchi, MD

Ophthalmology

20 yrs NPPES
NPI 1952478828
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Anuradha Pappu, MD

Gastroenterology

20 yrs NPPES
NPI 1215004189
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. David Wong, MD

Internal Medicine

20 yrs NPPES
NPI 1669549549
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· $163.08 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$163.08

Total received

2

Transactions

2

Paying companies

Top paying companies

PROCEPT BioRobotics Corporation$138.38
Abbott Laboratories$24.70

Among the 183,896 internal medicine doctors we've analyzed, about 37% received any industry payment (median $195 among those who did). This doctor's total ranks around the 80th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US internal medicine doctors.

Payments to David Wong do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Terry Talkin, MD

Infectious Disease

20 yrs NPPES
NPI 1811064710
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Yan Shlimak, MD

Internal Medicine

20 yrs NPPES
NPI 1477620375
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Peter Laird, MD

Internal Medicine

20 yrs NPPES
NPI 1477620383
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· $475.98 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$475.98

Total received

1

Transactions

1

Paying companies

Top paying companies

TELA Bio, Inc.$475.98

Among the 183,896 internal medicine doctors we've analyzed, about 37% received any industry payment (median $195 among those who did). This doctor's total ranks around the 88th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US internal medicine doctors.

Payments to Peter Laird do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Marilyn Amis, MD

Pediatrics

20 yrs NPPES
NPI 1376610287
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Monica Mc Donough, MD

Anesthesiology

20 yrs NPPES
NPI 1093882904
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Leon Chan, MD

Internal Medicine

20 yrs NPPES
NPI 1578630380
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Arthur Mehlman, MD

Gastroenterology

20 yrs NPPES
NPI 1447327259
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Amy Luo, MD

Anesthesiology

20 yrs NPPES
NPI 1396812111
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Lulu Yee, MD

Anesthesiology

20 yrs NPPES
NPI 1154498970
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Peter Yeh, MD

Anesthesiology

20 yrs NPPES
NPI 1215004056
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Michael Tran, MD

Family Medicine

20 yrs NPPES
NPI 1316014541
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Jose Elacion, MD

Family Medicine

20 yrs NPPES
NPI 1497823405
14427 CHASE ST, Panorama City, CA 91402(818) 830-7751
NPPES public registry
CMS Open Payments· $16.92 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$16.92

Total received

1

Transactions

1

Paying companies

Top paying companies

Cranial Technologies, Inc$16.92

Among the 136,402 family medicine doctors we've analyzed, about 35% received any industry payment (median $151 among those who did). This doctor's total ranks around the 68th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US family medicine doctors.

Payments to Jose Elacion do not imply any wrongdoing. Many are meals, education, or research support.

Dr. James Chou, MD

Internal Medicine

20 yrs NPPES
NPI 1023177623
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Adrian Rubin Jr., MD

Internal Medicine

20 yrs NPPES
NPI 1316006992
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Gerald Higgins, MD

Anatomic & Clinical Pathology

20 yrs NPPES
NPI 1497814081
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Michele Turner, MD

Family Medicine

20 yrs NPPES
NPI 1942369566
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Arthur Schlosser, MD

Pediatrics

20 yrs NPPES
NPI 1174682702
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Marian Grecia-Labaro, MD

Internal Medicine

20 yrs NPPES
NPI 1861551517
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Elaine Zollner, MD

Internal Medicine

20 yrs NPPES
NPI 1821157488
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Ronald Rosen, MD

Ophthalmology

20 yrs NPPES
NPI 1780743344
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry

Dr. Arya Saleh, MD

Internal Medicine

20 yrs NPPES
NPI 1801955406
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Albert Song, MD

Surgery

20 yrs NPPES
NPI 1366501975
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Joung-He Kim, MD

Pediatrics

20 yrs NPPES
NPI 1336208958
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Michelle Beshara, MD

Surgery

20 yrs NPPES
NPI 1063571685
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Fredric Schlussel, MD

Gastroenterology

20 yrs NPPES
NPI 1497814016
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Stephen De Vita, MD

Family Medicine

20 yrs NPPES
NPI 1306905922
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Joe Alanis, MD

Family Medicine

20 yrs NPPES
NPI 1215096839
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Indubala Vardhan, MD

Cardiovascular Disease

20 yrs NPPES
NPI 1124187745
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Mai Nguyen, MD

Pediatrics

20 yrs NPPES
NPI 1700945425
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Swaminathan Ramanathan, MD

Hematology & Oncology

20 yrs NPPES
NPI 1316006984
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Kathleen Metcalf, MD

Obstetrics & Gynecology

20 yrs NPPES
NPI 1386703981
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Michael Hakakha, MD

Obstetrics & Gynecology

20 yrs NPPES
NPI 1194884791
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Karen Hirsch, MD

Pediatrics

20 yrs NPPES
NPI 1124187737
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Suresh Ramamurti, MD

Cardiovascular Disease

20 yrs NPPES
NPI 1942369558
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Kenneth Ackerman, MD

Internal Medicine

20 yrs NPPES
NPI 1568521185
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Juan Vargas, MD

Family Medicine

20 yrs NPPES
NPI 1801955430
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Steven Kwon, MD

Internal Medicine

20 yrs NPPES
NPI 1932268679
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Jeffrey Hananel, DO

Pulmonary Disease

20 yrs NPPES
NPI 1124187703
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Ramamohan Rao, MD

Obstetrics & Gynecology

20 yrs NPPES
NPI 1396804977
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Carlos Fuster, MD

Pediatrics

20 yrs NPPES
NPI 1831258425
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Sidney Gold, MD

Psychiatry

20 yrs NPPES
NPI 1073672663
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Sami Azzam, MD

Infectious Disease

20 yrs NPPES
NPI 1053470674
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $47.11 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$47.11

Total received

1

Transactions

1

Paying companies

Top paying companies

Boston Scientific Corporation$47.11

Among the 3,681 infectious disease doctors we've analyzed, about 83% received any industry payment (median $1,189 among those who did). This doctor's total is on the lower end — around the 21th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US infectious disease doctors.

Payments to Sami Azzam do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Farzin Avaz, MD

Ophthalmology

20 yrs NPPES
NPI 1770642399
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. John Monroe, MD

Internal Medicine

20 yrs NPPES
NPI 1275692899
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Robert Shaw, MD

Internal Medicine

20 yrs NPPES
NPI 1073672713
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Lawrence Schneider, MD

Internal Medicine

20 yrs NPPES
NPI 1174682827
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. John Gruen, MD

Internal Medicine

20 yrs NPPES
NPI 1619036365
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Deepal Ekanayake, MD

Internal Medicine

20 yrs NPPES
NPI 1538228291
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Lorraine Minobe, MD

Anatomic & Clinical Pathology

20 yrs NPPES
NPI 1417016080
13652 CANTARA ST, Panorama City, CA 91402(818) 375-2000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Doctors in Panorama City, CA — NPPES Registry | DoctorsProof — Page 3 | DoctorsProof