Case-crossover approach to reduce confounding in condom effectiveness studiesL Warner,D Newman,M Kamb,J Zenilman,JM Douglas,G Bolan,J Rogers,F Rhodes,T PetermanAMERICAN JOURNAL OF EPIDEMIOLOGY(2001)引用 0|浏览1暂无评分AI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要