1. Department of General Surgery, Shanghai Jiao Tong University–Affiliated Shanghai First Peoples Hospital, Shanghai, P.R. China.
2. Department of General Surgery, Shanghai Jiao Tong University–Affiliated Shanghai First People’s Hospital, Shanghai, P.R. China.
3. Department of Network and Information Center, Shanghai Jiao Tong University–Affiliated Shanghai First People's Hospital, Shanghai, P.R. China.
4. Department of Endoscopic Diagnostics and Therapeutics, Kyushu University Hospital, Higashi-ku, Fukuoka, Japan.
5. Computing and Communications Center, Kyushu University, Higashi-ku, Fukuoka, Japan.