Lab Members

Our Staff

Photo of Jake Liang
Section Chief
M.D. – Harvard Medical School, Boston, MA
Internal Medicine Residency – New York University/Bellevue Hospital Center, New York, NY
Gastroenterology Fellowship – Massachusetts General Hospital, Boston, MA
Photo of Edward Doo
Adjunct Investigator
M.D. – Cornell University Medical College, New York, NY
Internal Medicine Residency – The New York Hospital-Cornell Medical Center, New York, NY
Photo of Marc Ghany
Clinical Tenure Track Investigator
M.D. – Royal College of Surgeons in Ireland, Dublin, Ireland
Internal Medicine Residency – Hospital of St. Raphael, New Haven, CT
Gastroenterology Fellowship – Tulane University School of Medicine, New Orleans, LA
Liver Diseases Fellowship – NIDDK, Bethesda, MD
M.H.Sc. – Duke University School of Medicine, Durham, NC
Photo of Theo Heller
Senior Investigator
M.D. – University of Witwatersrand Medical school
Internal Medicine Residency – Georgetown University Hospital
Viral Hepatitis Fellowship – NIAID, Bethesda, MD
Gastroenterology Fellowship – University of Maryland School of Medicine
Liver Diseases Fellowship – NIDDK, Bethesda, MD
Photo of Jay Hoofnagle
Adjunct Investigator
M.D. – Yale University School of Medicine, New Haven, CT
Internal Medicine Residency – University of Virginia Health System, Charlottesville, VA
Internal Medicine Residency – VA Medical Center, Washington, DC
Gastroenterology Fellowship – VA Medical Center, Washington, DC
Photo of Christopher Koh.
Associate Research Physician
M.D. – Saba University School of Medicine, Netherlands-Antilles
M.H.Sc. - Duke University School of Medicine, Durham, NC
Internal Medicine Residency – Harbor Hospital, Baltimore, MD 
Liver Diseases Fellowship – NIDDK, Bethesda, MD
Gastroenterology Fellowship – University of Maryland/NIH Scholars Program, Baltimore, MD & Bethesda, MD
Photo of Yaron Rotman
Investigator
M.D. – Hebrew University Hadassah Medical School, Jerusalem, Israel
M.Sc. – Hebrew University Hadassah Medical School, Jerusalem, Israel
Internal Medicine Residency – Rabin Medical Center, Petach-Tiqwa, Israel
Gastroenterology Fellowship – Rabin Medical Center, Petach-Tiqwa, Israel
Liver Diseases Fellowship – NIDDK, Bethesda, MD
Photo of Averell Sherker
Adjunct Investigator
M.D. – Queens University Faculty of Health Sciences, Kingston, Canada
Internal Medicine Residency – Mt. Sinai Hosptial University, Toronto, Canada
Gastroenterology Fellowship – University of Toronto, Ontario, Canada
Liver Diseases Fellowship – Stanford University, Stanford, CA

Hepatology Clinical Fellows

Gracia Maria Viana Rodriguez Headshot
Gracia Maria Viana Rodriguez, M.D.
Clinical Fellow

Education:

M.D – Universidad Dr. Jose Matias Delgado, El Salvador
Internal Medicine Residency - Bridgeport Hospital, Yale New Haven Health, Connecticut.

Recently, I completed my internal medicine residency at Bridgeport Hospital, Yale New Haven Health before beginning my hepatology fellowship at the NIDDK. During my stay at the LDB, I plan on taking part in clinical research trials focusing on the study of portal hypertension, non-cirrhotic portal hypertension and fatty liver disease Complications, diagnostics and treatment options.

David Yardeni Headshot
David Yardeni, M.D.
Clinical Fellow

Education:

M.D. – Ben-Gurion University of the Negev, Goldman Medical School, Beer-Sheva, Israel
Internal Medicine Residency – Soroka University Medical Center, Beer-Sheva, Israel
Gastroenterology Fellowship – Soroka University Medical Center, Beer-Sheva, Israel

Observing the results of decompensated liver diseases during my residency in internal medicine and my fellowship in gastroenterology have profoundly impacted my interest in hepatology. The introduction in recent years of novel pharmacological agents leading to improved treatment of liver diseases that were incurable just a few years ago, has demonstrated once again the importance of conducting meaningful studies that will influence the patients’ health and quality of life. For these reasons I am now participating in the Hepatology fellowship at the Liver Disease Branch of the NIH.

My current research interests include viral Hepatitis B and D, Non-Alcoholic Fatty Liver disease and Fontan Associated Liver Disease.

Photo of Nehna Abdul Majeed.
Nehna Abdul Majeed
Clinical Fellow

Education:

MBBS: Jubilee Mission Medical College and Research Institute, Kerala, India
Internal Medicine Residency: Medstar Health Internal Medicine Residency, Baltimore, MD
Chief Residency: Medstar Health Internal Medicine Residency, Baltimore, MD

My research interests include treatment trials of hepatitis B and D, non-alcoholic fatty liver disease, drug induced liver injury, non-cirrhotic portal hypertension, primary sclerosing cholangitis and impact of systemic diseases on liver diseases. After graduating from the Hepatology fellowship at NIH, I plan to pursue Gastroenterology fellowship and practice at an academic center as a clinical Hepatologist where I will have the opportunity to dedicate my time to teaching, clinical work and research.

Photo of Asif Hitawala.
Asif Hitawala
Clinical Fellow

Education:

M.D. - Ravindra Nath Tagore Medical College, Udaipur, India
Residency - Fairview Hospital/Cleveland Clinic, Cleveland, OH

I have always found liver to be one of the most fascinating organs of the body. While there are mechanical alternatives to heart and kidney failure such as left ventricular assist device or dialysis respectively, the only substitute for liver is another liver. Hence, I came to NIH to learn more about the mechanisms of liver fibrosis and find ways to prevent and reverse it.

My current research interests include Fontan associated liver disease, Non-alcoholic fatty liver disease and non-cirrhotic portal hypertension.

Clinical Specialists

Patricia Alcivar
Patient Care Coordinator
T: 301-435-6121
F: 301-435-9160
F: 301-480-5329
Steffan Cooper, MPH, BSN, RN, CNRN
Research Nurse, Specialist
T: 301-451-6984
F: 301-451-9160
F: 301-480-5329
Elenita M. Rivera, BSN, RN
Research Nurse, Specialist
T: 301-435-6125
F: 301-451-9160
F: 301-480-5329
Anna Rivero, BSN, RN
Research Nurse, Specialist

T: 301-451-7007
F: 301-435-9160
F: 301-480-5329

Zahra Sarrafan-Chaharsoughi, MD
Research Assistant, M.D. – Shahid Sadoughi University of Medical Sciences, School of Medicine, Yazd, Iran
T: 301-480-7057
F: 301-451-9160
F: 301-480-5329
Shani C. Scott, BSN, RN
Research Nurse, Specialist

T: 301-451-6983
F: 301-435-9160
F: 301-480-5329

Jaha Norman-Wheeler, BA, RN, CCRC
Research Nurse Manager (Acting), Research Coordinator
T: 301-435-6122
F: 301-435-9160
F: 301-480-5329