Questionnaire survey regarding the current status of super-extended lymph node dissection in Japan
Shinji Morita, Takeo Fukagawa, Hisataka Fujiwara, Hitoshi Katai, Department of Surgical Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo 104-0045, Japan
Author contributions: Morita S designed and performed the research and wrote the paper; Fukagawa T and Katai H supervised the report; Fujiwara H provided clinical advice; Katai H designed the research and contributed to the analysis.
Institutional review board statement: We have not included a statement of IRB review, since IRB approval is not required for questionnaire research that does not provide personal information.
Informed consent statement: Patients were not required to give informed consent prior to participation in the study because the analysis used anonymous clinical data that were obtained after each patient had agreed to receive treatment and had provided written consent.
Conflict-of-interest statement: We have no financial relationships to disclose.
Data sharing statement: No additional data are available.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Shinji Morita, MD, Department of Surgical Oncology, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan. email@example.com
Telephone: +81-3-35422511 Fax: +81-3-25422545
Received: March 28, 2016
Peer-review started: April 1, 2016
First decision: May 23, 2016
Revised: June 19, 2016
Accepted: July 11, 2016
Article in press: July 13, 2016
Published online: September 15, 2016