*Division of Colorectal Surgery, National Cancer Center Hospital, Tokyo, Japan;
†Department of Gastroenterological Surgery, Oita University Faculty of Medicine, Oita, Japan;
‡JCOG Data Center, Multi-institutional Clinical Trial Support Center, National Cancer Center, Tokyo, Japan;
§Department of Surgery, Jichi Medical University Saitama Medical Center, Saitama, Japan;
¶Department of Surgical Oncology, Tokyo Medical and Dental University, Tokyo, Japan; and
‖Department of Surgery, Kitasato University Hospital, Kanagawa, Japan.
Reprints: Dr Masafumi Inomata, Department of Gastroenterological Surgery, Oita University Faculty of Medicine, 1-1, Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan. E-mail: [email protected].
Disclosure: This study has been supported by the National Cancer Center Research and Development Fund, Grant-in-Aid for Cancer Research, Health and Labour Sciences Research Grant for Clinical Cancer Research from the Ministry of Health, Labour and Welfare of Japan. The authors declare no conflict of interest.
Trial registration: ClinicalTrials.gov, number NCT00147134, and UMIN-CTR, number C000000105.