Clinical research: past history, future prospects.
D001291:Attitude of Health Personnel; D001294:Attitude to Health; D049672:History, 19th Century; D049673:History, 20th Century; D011340:Problem Solving; D012106:Research / Q000266:history; D012108:Research Personnel; D012109:Research Support as Topic; D006113:United Kingdom; D014481:United States