MD researchers.
D002321:Career Choice; D009316:National Institutes of Health (U.S.) / Q000458:organization & administration*; D010820:Physicians / Q000600:supply & distribution*; D012108:Research Personnel / Q000193:education / Q000600:supply & distribution; D012109:Research Support as Topic / Q000706:statistics & numerical data; D013337:Students, Medical; D014481:United States