Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 49 2 2020 02 01 392 393 Ce YANG State Key Laboratory of Trauma, Burn and Combined Injury, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, China Zhilan CHEN Reproductive Medical Center, Wuhan Central Hospital, Wuhan, China Liyong CHEN Department of Anesthesiology, Research Institute of Surgery and Daping Hospital, Third Military Medical University, Chongqing, China 2020 01 29 No Abstract https://ijph.tums.ac.ir/index.php/ijph/article/view/19595 https://ijph.tums.ac.ir/index.php/ijph/article/download/19595/6679