Department of Gastroenterological Surgery and Oncology, Medical Research Institute Kitano Hospital, Osaka, Japan

Funding/Support: None reported.

Financial Disclosure: None reported.

Correspondence: Takehito Yamamoto, M.D., Ph.D., Department of Gastroenterological Surgery and Oncology, Kitano Hospital Medical Research Institute, 2-4-20, Ogimachi, Kita-ku, Osaka 530-8480, Japan. Email; [email protected]; Twitter account; @keiyou30