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.