1. Department of Gynecology and Obstetrics, Key Laboratory of Obstetrics & Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second Hospital, Chengdu, China
2. The State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
3. Department of Emergency Medicine, Thomas Jefferson University Hospital, Philadelphia, PA, USA
4. Department of Surgery, Emergency Medicine, Kaiser Permanente Santa Clara Medical Center, Santa Clara, CA, USA
5. College of Biological Sciences, Sichuan University, Chengdu, China
6. Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China