Ayman A. Hosny        Donald Mang-Sum Lai        Sri A. Rohra     Ayman A. Hosny, M.D., F.A.C.C., F.C.C.P. Dr. Ayman Hosny earned his M.B. and B.Ch. at the Cairo University School of Medicine, where he graduated with honors. He went on to complete his internal medicine residency at Highland Hospital and the University of Rochester in Rochester, N.Y., and his cardiology fellowship at Bridgeport Hospital in Connecticut. A Diplomate of the American Board of Internal Medicine, Dr. Hosny is board certified in internal medicine, cardiology, critical care and interventional cardiology. He regularly attends continuing education courses and is an active member in many professional organizations, including the American College of Cardiology, American College of Chest Physicians ad the Alameda-Contra Costa Medical Society.     Donald Mang-Sum Lai, M.D., F.A.C.C. Dr. Donald Mang-Sum Lai earned his B.A. at the University of Pennsylvania before advancing to the University of Maryland School of Medicine to earn his M.D. He went on to complete his internal medicine residency at the Mercy Medical Center, University of Maryland and his clinical cardiology fellowship at the University of California, Davis Medical Center. Board certified in internal medicine and cardiology, Dr. Lai is a member and fellow of such professional organizations as the American College of Cardiology, American College of Chest Physicians and the California Medical Association.     Sri A. Rohra, M.D., F.A.C.C. Dr. Sri Rohra graduated from medical school at Grant Medical College, Bombay University in 1981. A Fellow of the American College of Cardiology, Dr. Rohra has completed residencies and internships in medicine, internal medicine and psychiatry along with a fellowship in cardiovascular diseases. Certified by the American Board of Internal Medicine in 1981 and by the Subspecialty Board of Cardiovascular Diseases, American Board of Internal Medicine in 1991, Dr. Rohra stays abreast of the latest technological advances in his field with memberships in the American Heart Association, American Society of Echocardiography, American Medical Association, California Medical Association, Alameda-Contra Costa Medical Association and the American Association of Physicians of Indian Origin.