1 Division of Colon and Rectal Surgery, Department of Surgery, Taipei, Mackay Memorial Hospital, Taipei, Taiwan, Republic of China. tzuchi@ms2.mmh.org.tw.
2 Department of Surgery, Taipei Medical University, Taipei, Taiwan, Republic of China. tzuchi@ms2.mmh.org.tw.
3 , #92, Section 2, Chung-San North Road, Taipei, Taiwan, Republic of China. tzuchi@ms2.mmh.org.tw.
4 Division of Colon and Rectal Surgery, Department of Surgery, Taipei, Mackay Memorial Hospital, Taipei, Taiwan, Republic of China.
5 Department of Surgery, Taipei Medical University, Taipei, Taiwan, Republic of China.