Motoharu Shibusawa

Department of Hematology Medicine, Tokyo Metropolitan Health and Medical Treatment Corporation, Tama-Hokubu Medical Center, Tokyo, Japan

Takaaki Matsumura

Department of Gastrointestinal Medicine, Tokyo Metropolitan Health and Medical Treatment Corporation, Tama-Hokubu Medical Center, Tokyo, Japan

Hisashi Tsutsumi

Department of Hematology Medicine, Tokyo Metropolitan Health and Medical Treatment Corporation, Tama-Hokubu Medical Center, Tokyo, Japan

Yuuji Itou

Department of Pathology, Tokyo Metropolitan Health and Medical Treatment Corporation, Tama-Hokubu Medical Center, Tokyo, Japan

Yoshiaki Shibata

Department of Gastrointestinal Medicine, Tokyo Metropolitan Health and Medical Treatment Corporation, Tama-Hokubu Medical Center, Tokyo, Japan