1. Medical School of Chinese People's Liberation Army, the Chinese PLA General Hospital, Beijing, People's Republic of China.
2. Trauma Research Center, First Hospital Affiliated to the Chinese PLA General Hospital, Beijing, People's Republic of China.
3. Department of Hepatobiliary Surgery, the 309th Hospital of Chinese PLA, Beijing, People's Republic of China.
4. Emergency Department, First Affiliated Hospital of Wenzhou Medical College, Wenzhou, People's Republic of China.