1. Faculty of Hepato-Pancreato-Biliary Surgery, Institute of Hepatobiliary Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing, China
2. School of Basic Medical Sciences, Inner Mongolia Medical University, Hohhot, China
3. The Fifth Medical Center, Chinese PLA General Hospital, Beijing, China
4. Department of Respiratory, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen, China.