Author(s) affiliations:Ken Yajima1,3, Akira Shimada1, Hiroshi Hirose1, Akira Kasuga2, Takao Saruta1
1Department of Internal Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
2Department of Internal Medicine, Tokyo Denryoku Hospital, Tokyo, 160-0016, Japan.
3Department of Internal Medicine, Hamamatsu Red Cross Hospital, Hamamatsu, 430-0907, Japan.