National preoperative HIV prevalence in China: a retrospective analysis of 4,753,874 surgical patients by Hongzhi Lv, Juan Wang, Qi Zhang, Wei Chen, Zhiyong Hou, Dongzheng Li, Yongmin Jing, Xin Xing, Xuebin Zhang, Jin Qin, Tong Liu, Xiaoli Yan, Peizhi Yuwen, Yujia Li, Zehao Wu, Kuo Zhao, Ning Zhang, Yi Shao, Sifan Yang, Lina Ma, Yuteng Ren, Jinglue Hu, Xiaolin Zhang, Yan Wang, Wenjing Li, Yingze Zhang

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