Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Peking Union Medical College Hospital, Division of Colorectal Surgery, Peking University Cancer Hospital & Institute -Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Peking Union Medical College Hospital, Division of Colorectal Surgery, Peking University Cancer Hospital & Institute - Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Peking Union Medical College Hospital, Division of Colorectal Surgery, Shanghai Jiao Tong University (SJTU) - Department of General Surgery, Shanghai Jiao Tong University (SJTU) - Department of General Surgery, Shanghai Jiao Tong University (SJTU) - Department of General Surgery, Shanghai Jiao Tong University (SJTU) - Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University - Department of Colorectal Surgery, The First Affiliated Hospital of Nanjing Medical University - Department of Colorectal Surgery, The First Affiliated Hospital of Nanjing Medical University - Department of Colorectal Surgery, Chinese General Hospital of People’s Liberation Army - Department of General Surgery, Chinese General Hospital of People’s Liberation Army - Department of General Surgery, Chinese General Hospital of People’s Liberation Army - Department of General Surgery, Fujian Medical University - Department of Colorectal Surgery, Fujian Medical University - Department of Colorectal Surgery, Fujian Medical University - Department of Colorectal Surgery, Sichuan University - West China Hospital, Department of Gastrointestinal Surgery, Sichuan University - Colorectal Cancer Center, Shanghai Jiao Tong University (SJTU) - Department of Gastrointestinal Surgery, Shanghai Jiao Tong University (SJTU) - Department of Gastrointestinal Surgery, Peking University Cancer Hospital & Institute - Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital & Institute -Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Harbin Medical University - Department of Colorectal Surgery, Harbin Medical University - Department of Colorectal Surgery, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Peking Union Medical College Hospital, Division of Colorectal Surgery, Capital Medical University - Xuanwu Hospital, Department of General Surgery, Capital Medical University - Xuanwu Hospital, Department of General Surgery, Fudan University - Zhongshan Hospital, Department of General Surgery, Fudan University - Zhongshan Hospital, Department of General Surgery, Sun Yat-Sen University (SYSU) - Sixth Affiliated Hospital, Department of Colorectal Surgery, Sun Yat-Sen University (SYSU) - Sixth Affiliated Hospital, Department of Colorectal Surgery, The First Hospital of Jilin University - Department of Gastrointestinal Surgery, The First Hospital of Jilin University - Department of Gastrointestinal Surgery, Southern Medical University - Department of General Surgery, Southern Medical University - Department of General Surgery, Peking University - Department of Gastroenterological Surgery, Peking University People's Hospital - Department of Gastrointestinal Surgery, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Peking Union Medical College Hospital, Division of Colorectal Surgery, Capital Medical University - Beijing Friendship Hospital, Department of General Surgery, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Peking Union Medical College Hospital, Division of Colorectal Surgery, Zhejiang University - Department of Colorectal Surgery and Oncology, Chinese Academy of Medical Sciences - Department of Epidemiology and Statistics, Capital Medical University - Department of General Surgery, Shanghai Jiao Tong University (SJTU) - Department of General Surgery, Peking University Cancer Hospital & Institute - Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education) and Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Peking Union Medical College Hospital, Division of Colorectal Surgery

Chinese Academy of Medical Sciences - Department of Obstetrics and Gynecology, Hebei Medical University - Department of Obstetrics and Gynecology, Tangshan Maternal and Child Health Hospital - Department of Obstetrics and Gynecology, Henan Provincial People's Hospital - Department of Obstetrics and Gynecology, Guangzhou Medical University - Third Affiliated Hospital Department of Obstetrics and Gynecology, Huazhong University of Science and Technology - Department of Obstetrics and Gynecology, Xiamen University - First Affiliated Hospital, Department of Obstetrics and Gynecology, Guangzhou Women and Children's Medical Center - Department of Gynecology, Liuzhou Maternity and Child Healthcare Hospital - Department of Obstetrics and Gynecology, Anhui Medical University - Second Affiliated Hospital, Department of Obstetrics and Gynecology, Tibet Autonomous Region People’s Hospital - Department of Obstetrics and Gynecology, Zhengzhou University - Department of Obstetrics and Gynecology, Guangxi Medical University - Department of Obstetrics and Gynecology, Nantong University - Department of Obstetrics and Gynecology, Peking University - Third Hospital, Department of Obstetrics and Gynecology, Harbin Medical University - First Affiliated Hospital. Department of Obstetrics and Gynecology, Capital Medical University - Beijing Ditan Hospital, Department of Obstetrics and Gynecology, Capital Medical University - Xuanwu Hospital Department of Obstetrics and Gynecology, Capital Medical University - Beijing Anzhen Hospital, Department of Obstetrics and Gynecology, Inner Mongolia People’s Hospital - Department of Obstetrics and Gynecology, Capital Medical University - Beijing Chaoyang Hospital, Department of Obstetrics and Gynecology, Harbin Medical University - Department of Obstetrics and Gynecology, Chinese Academy of Medical Sciences - Department of Epidemiology and Statistics and Chinese Academy of Medical Sciences - Department of Obstetrics and Gynecology

Chinese Academy of Medical Sciences - Department of Obstetrics and Gynecology, Chinese Academy of Medical Sciences - Department of Obstetrics and Gynecology, Southern Medical University - Department of Gynaecology and Obstetrics, Chinese Academy of Medical Sciences - Department of Obstetrics and Gynecology, Chinese Academy of Medical Sciences - Department of Obstetrics and Gynecology, Chinese Academy of Medical Sciences - Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences - Department of Epidemiology and Statistics, Children’s Hospital of Shanxi Province, Maternal and Child Health Hospital of Wuxi, Maternal and Child Health Hospital of Gansu Province, Maternal and Child Health Hospital of Foshan, Guiyang Maternal and Child Health Care Hospital, China Medical University - Department of Obstetrics and Gynecology and Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Obstetrics and Gynecology