propensityscore相关论文
An evaluation of treatments and survival rates for pancreatic adenocarcinoma through survival analys
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目的 探讨儿童血清维生素A、E与肺炎支原体肺炎之间的关系.方法 153例肺炎支原体肺炎的患儿入选病例组,635例健康儿童入选对照组.......
