Epidemiological Characteristics of Patients with Postpartum Hemorrhage in Northern Guizhou before and after the Implementation of Comprehensive Two-child Policy and Its Influencing Factors in ICU Admission:a Single-center Study 
LUO Shiyu,LUO Shuju,WANG Shaojun,GENG Zhengguang,FU Xiaoyun
Chinese General Practice . 2019, (33): 4073 -4077 .  DOI: 10.12114/j.issn.1007-9572.2019.00.492