Staff, Pictures and Bios

James Zwiebel, MD, Branch Chief, IDB

James Zwiebel received the MD degree from the Mount Sinai School of Medicine, where he also completed his residency training in internal medicine. Following a clinical fellowship in hematology and oncology at the George Washington University Medical Center and research fellowships at both the National Cancer Institute and the National Heart Lung and Blood Institute, he continued his laboratory work on cancer gene therapy as a member of the faculty at Lombardi Cancer Center of the Georgetown University Medical Center, where he also practiced hematology and oncology. More…

Susan Percy Ivy, MD, Associate Branch Chief, IDB

S. Percy Ivy, MD is the Associate Chief (2005) of the Investigational Drug Branch (IDB) which is part of the Cancer Therapy Evaluation Program (CTEP) in the Division of Cancer Treatment and Diagnosis of the National Cancer Institute. She received her medical and subspecialty training at Tulane University Medical School, Vanderbilt University Medical Center and the National Cancer Institute, respectively. More…

A. P. Chen, MD, Medical Officer

Dr. Chen is currently a Medical Officer in the Target Therapeutics 1 Section of the Investigational Drug Branch of the Cancer Therapy Evaluation Program of the National Cancer Institute. She is board certified in Internal Medicine and Medical Oncology. More…

Helen Chen, MD, Senior Investigator

Austin Doyle, MD, Senior Investigator

Dr. Doyle received his medical degree from the University of Maryland School of Medicine, where he completed internship and residency training in Internal Medicine. Dr. Doyle completed a medical oncology fellowship in the NCI-Navy Medical Oncology Branch of NCI. More…

Igor Espinoza-Delgado, MD, Senior Investigator

Igor Espinoza-Delgado received the MD degree from the Central University of Venezuela, where he also completed his residency training in internal medicine. He then was a visiting fellow in the Biological Response Modifiers Program of the National Cancer Institute. More…

Howard Streicher, MD, Senior Investigator

Dr Streicher received AB in physics from Cornell University and his medical degree from New York University. He completed an internship and residency training in Internal Medicine at the New York University-Bellevue Medical Center and New York Veterans Hospital. More…

Naoko Takebe, MD, PhD, Senior Investigator

Dr. Takebe joined CTEP in September 2007 as a Senior Investigator at the Investigational Drug Branch, where she works with academic investigators and industry collaborators to carry out the clinical development of promising new cancer therapies. More…

John J. Wright, MD, PhD, Senior Investigator

Dr Wright received a PhD in molecular virology from the University of Illinois Medical Center and his medical degree from Northwestern University Medical School. He completed internship and residency training in Internal Medicine at the University of Virginia and then was a research fellow in the Metabolism Branch of the National Cancer Institute. More…