1 Genome Analysis Center, Yamanashi Central Hospital, 1-1-1 Fujimi, Kofu, Yamanashi, Japan. Electronic address: [email protected].
2 Department of Gastroenterology, Yamanashi Central Hospital, 1-1-1 Fujimi, Kofu, Yamanashi, Japan; The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan.