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Shinichi Morita
Department of Gastroenterology and Hepatology, Uonuma Institute of Community Medicine Niigata University Hospital, Japan
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Toshinori Takada
Department of Respiratory Medicine and Infectious Disease, Uonuma Institute of Community Medicine Niigata University Hospital, Japan
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Kazumasa Ohashi
Department of Respiratory Medicine and Infectious Disease, Uonuma Institute of Community Medicine Niigata University Hospital, Japan
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Shuji Terai
Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, Japan
