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Dr Oscar John Ma

New York, United States

Dr. Oscar John Ma is a highly accomplished medical professional. His postgraduate training was highly diverse, starting with a preliminary internship in internal medicine at the Washington Hospital Center in Washington, D.C., from 1990 to 1991. In 1991, he started a residency in emergency medicine at the Medical College of Wisconsin in Milwaukee and served as Chief Resident from 1993 to 1994.