
University of California,
San Diego (UCSD)
Rebecca and John Moores UCSD
Cancer Center
La Jolla, CA
The Burnham Institute
La Jolla, CA
Dana Farber Cancer Institute
Harvard Medical School
Boston, MA
Johns Hopkins University
Oncology Center
Baltimore, MD
Long Island Jewish Medical
Center
Division of Hematology/Oncology
New Hyde Park, NY
M.D. Anderson Cancer Center
Houston, TX
Ohio State University
Cancer Center
Columbus, Ohio
Barts Cancer Centre of
Excellence
Barts Hospital
West Smithfield, London
Mayo Clinic
Rochester, MN

M.D. Anderson Cancer Center
The University of Texas
M.D. Anderson Cancer Center
Houston, Texas
http://www.mdanderson.org
Dr. O'Brien, is a Professor and Internist in the Department of Hematology. Dr. O'Brien is a leading expert in leukemia research, specializing in the biology of, and therapy for, Chronic Lymphocytic Leukemia and Chronic Myelocytic Leukemia. Board certified in Internal Medicine and Medical Oncology, Dr. O'Brien is a published author, serves on various medical societies and has also been awarded numerous medical honors.