Emergency Department Peking Union Medical College Hospital Beijing 100730 China;
Emergency Department Civil Aviation General Hospital Beijing 100123 China;
Accident and Emergency Medicine Academic Unit the Chinese University of Hong Kong Hong Kong 999077 China;
Emergency Department Peking Union Medical College Hospital Beijing 100730 China;
Department of Radiology Peking Union Medical College Hospital Beijing 100730 China;
Emergency Department Peking Union Medical College Hospital Beijing 100730 China;
Emergency Department Peking Union Medical College Hospital Beijing 100730 China;