1. Department of Surgery, HepingFuyou Branch, Taipei City Hospital, Taipei, Taiwan
2. Department of Surgery, University of Taipei, Taipei, Taiwan
3. Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
4. Department of Surgery, Zhong-Xing Branch, Taipei City Hospital, Taipei, Taiwan
5. Department of Surgery, Taipei Tzu Chi Hospital, New Taipei City, Taiwan
6. Department of Surgery, School of Medicine, Buddhist Tzu Chi University, Hualien, Taiwan