1.National Training Center of Healthcare-associated Infection Management, National Clinical Research Center for Geriatric Disorders [Xiangya Hospital], Xiangya Hospital, Central South University, Changsha 410008, China;2.Beijing Hospital, Beijing 100730, China;3.Public Health Clinical Center of Chengdu of Sichuan Province, Chengdu 610000, China;4.The First Hospital of Hunan University of Chinese Medicine, Changsha 410021, China;5.The First Affiliated Hospital of Hunan University of Medicine, Huaihua 418000, China;6.Jiangxi Provincial Children's Hospital, Nanchang 330006, China;7.The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China;8.Hunan Provincial Center for Disease Control and Prevention, Changsha 410028, China;9.National Health Development Research Center, Beijing 100044, China;10.Huaihua First People's Hospital, Huaihua 418000, China;11.Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, China;12.Beijing Center for Disease Prevention and Control, Beijing 100013, China;13.Sanya Center for Disease Prevention and Control, Sanya 572000, China;14.Hunan Provincial People's Hospital, Changsha 410005, China;15.Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250021, China;16.Henan Provincial People's Hospital, Zhengzhou 450003, China;17.The First Hospital Affiliated to Shaoyang College, Shaoyang 422001, China;18.The First Medical Center, Chinese PLA General Hospital, Beijing 100039, China;19.The Second Xiangya Hospital of Central South University, Changsha 410011, China;20.The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China;21.Hunan Children's Hospital, Changsha 410007, China;22.Xuanwu Hospital, Capital Medical University, Beijing 100053, China;23.General Supervision Agency of Health Commission of Anhui Pro-vince, Hefei 230002, China;24.Affiliated Hospital of Xuzhou Medical University, Xuzhou 221006, China;25.West China Hospital, Sichuan University, Chengdu 610041, China;26.The Center of Health Supervision National Health Commission of the People's Republic of China, Beijing 100007, China;27.Hunan Academy of Traditional Chinese Medicine Affili-ated Hospital, Changsha 410006, China;28.Anhui No.2 Provincial People's Hospital, Hefei 230012, China;29.Wenzhou People's Hospital, Wenzhou 325000, China;30.Huashan Hospital Affiliated to Fudan University, Shanghai 200040, China;31.Changsha Central Hospital, Changsha 410018, China;32.Peking University First Hospital, Beijing 100034, China;33.The Third Xiangya Hospital of Central South University, Changsha 410013, China;34.Jiangsu Provincial Health Supervision Institute, Nanjing 210009, China;35.Second Provincial People's Hospital of Gansu, Lanzhou 730000, China;36.Heping Hospital Affiliated to Changzhi Medical College, Changzhi 046000, China;37.Beijing Red Cross Emergency Medical Rescue Center, Beijing 100192, China;38.Qinghai University Affiliated Hospital, Xining 810001, China