Sawada Koji, Ohtake Takaaki, Ueno Nobuhiro, Ishikawa Chisato, Abe Masami, Miyoshi Shigeki, Suzuki Yasuaki, Tokusashi Yoshihiko, Fujiya Mikihiro, Kohgo Yutaka
Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical College, Asahikawa, Japan.
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