作者: Hui Zhang , Chun Gao , Long Fang , Hong-Chuan Zhao , Shu-Kun Yao
DOI: 10.3109/00365521.2012.719926
关键词:
摘要: … Considering these two independent control groups, very limited available studies and for subgroup analysis, this study was treated as two independent case-control studies [22]. …