1. Department of Colorectal Surgery, China Medical University Hsinchu Hospital, Zhubei, Taiwan.
2. Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan.
3. College of Medicine, China Medical University, Taichung, Taiwan.
4. Department of Gastroenterology, China Medical University Hsinchu Hospital, Zhubei, Taiwan.
5. Department of General Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China.
6. Section for Surgical Research, Department of Surgery, Medical University of Graz, Graz, Austria.