【作者(必填)】 Yusuf S, Wittes J,
【文题(必填)】 Analysis and interpretation of treatment effects in subgroups of patients in randomized clinical trials.【年份(必填)】
[size=0.8465em]JAMA.[size=0.8465em] [size=0.8465em]1991[size=0.8465em] [size=0.8465em]Jul 3;266(1):93-8.
【全文链接或数据库名称(选填)】http://www.ncbi.nlm.nih.gov/pubmed/2046134