1 Department of Internal Medicine, Division of Gastroenterology, Self-Defense Forces Central Hospital, Tokyo, Japan; Department of Family Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
2 Department of Eat-loss Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
3 Department of General Medicine, National Defense Medical College, Saitama, Japan onoyousuke1979@yahoo.co.jp.
4 Department of Dermatology, Self-Defense Forces Central Hospital, Tokyo, Japan.