1. Division of Colon and Rectal Surgery, Chang Gung Memorial Hospital, Chang Gung University College of Medicine , Guei-Shan , Tao-Yuan , Taiwan
2. School of Traditional Chinese Medicine, Chang Gung University, Graduate Institute of Clinical Medical Sciences, Chang Gung University , Tao-Yuan , Taiwan
3. Division of Colon and Rectal Surgery, Chang Gung Memorial Hospital, Chang Gung University College of Medicine , Keelung , Taiwan
4. Division of Colon and Rectal Surgery, Chang Gung Memorial Hospital, Chang Gung University College of Medicine , Linko, 5, Fu-Hsing Street, Guei-Shan , Tao-Yuan , Taiwan