1. Department of Colorectal Surgery, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, P. R. China
2. Division of Colon and Rectal Surgery, Department of Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
3. The College of Medicine, Endo-Surgical Center of Florida, Department of Colorectal Surgery, Florida Hospital, Orlando, FL, USA
4. Colorectal and Pelvic Surgery Division, Department of Surgical Oncology, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
5. Department of Colorectal Surgery, Cleveland Clinic Florida, Weston, FL, USA