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Hideaki Kojima, Minoru Kitago, Eisuke Iwasaki, Yohei Masugi, Yohji Matsusaka, Hiroshi Yagi, Yuta Abe, Yasushi Hasegawa, Shutaro Hori, Masayuki Tanaka, Yutaka Nakano, Yusuke Takemura, Seiichiro Fukuhara, Yoshiyuki Ohara, Michiie Sakamoto, Shigeo Okuda, Yuko Kitagawa 
World J Gastroenterol 27(3):294-304. Published online Jan 21, 2021. doi: 10.3748/wjg.v27.i3.294