[Importance of scientific research design to improve the quality of clinical study].
Wang
J
J
D003625:Data Collection / Q000592:standards; D019937:Diagnostic Techniques and Procedures / Q000592:standards; D004992:Ethics, Medical; D006801:Humans; D015233:Models, Statistical; D011237:Predictive Value of Tests; D011786:Quality Control; D012106:Research / Q000592:standards*; D012107:Research Design / Q000592:standards*