1. Division of Colon and Rectal Surgery, Department of Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
2. Department of Medical Research, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
3. School of Public Health, National Defense Medical Center, Taipei, Taiwan
4. Taiwanese Injury Prevention and Safety Promotion Association, Taipei, Taiwan
5. Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan.