Department of Critical Care Medicine, 309th Hospital of Chinese People's Liberation Army, Beijing 100091, China;
Centre of Clinical Epidemiology and Evidence-based Medicine, Beijing Children Hospital, Capital Medical University, School of Public Health, Capital Medical University, Beijing 100069, China;
Medical ICU, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China;
Centre of Clinical Epidemiology and Evidence-based Medicine, Beijing Children Hospital, Capital Medical University, School of Public Health, Capital Medical University, Beijing 100069, China;
Department of Critical Care Medicine, 309th Hospital of Chinese People's Liberation Army, Beijing 100091, China;
Department of Critical Care Medicine, 309th Hospital of Chinese People's Liberation Army, Beijing 100091, China;
Department of Critical Care Medicine, Beijing Fuxing Hospital, Capital Medical University, Beijing 100038, China;