Kumagai, Youichi
Yamamoto, Eisuke
Higashi, Morihiro
Ishiguro, Toru
Hatano, Satoshi
Toyomasu, Yoshitaka
Amano, Kunihiko
Suzuki, Okihide
Ishibashi, Kei-ichiro
Mochiki, Erito
Tamaru, Jun-ichi
Ishida, Hideyuki
Funding for this research was provided by:
MEXT Kakenhi (19K08477)
Article History
Received: 6 August 2020
Accepted: 27 October 2020
First Online: 5 November 2020
Competing interests
: Author Y.K. borrowed a GIF-H290EC from Olympus Medical Systems Co. without payment. The other authors do not have a conflict.