Funding for this research was provided by:
Research Grant from Japan Consortium for Advanced Surgical Endoscopy (J-CASE 2018)
Received: 15 May 2020
Accepted: 9 January 2021
First Online: 1 February 2021
Compliance with ethical standards
: Drs. Yuki Ushimaru, Noriko Matsuura, Yasushi Yamasaki, Yoji Takeuchi, Kotaro Yamashita, Takuro Saito, Koji Tanaka, Tomoki Makino, Tsuyoshi Takahashi, Yukinori Kurokawa, Makoto Yamasaki, Hidetoshi Eguchi, Yuichiro Doki, and Kiyokazu Nakajima have no conflicts of interest or financial ties to disclose.
: All procedures in this study were performed in accordance with the ethical standards of the responsible committee on institutional animal experimentation.