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COVID-19患者深静脉血栓发生的临床特征和危险因素:1 771例住院患者回顾性分析

, 2020
张晓华   +15 more
semanticscholar   +1 more source

再次剖宫产产后出血危险因素分析:2 442例产妇的回顾性研究

, 2019
曾义   +7 more
semanticscholar   +1 more source

克罗恩病术后复发的危险因素、预测、预防和管理

, 2016
管丽芳   +4 more
semanticscholar   +1 more source

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