1 Division of General Medicine (Notomi, Harada), Showa Medical University Hospital, Shinagawa-ku, Tokyo, Japan; Diagnostic and Generalist Medicine (Harada), Dokkyo Medical University Hospital, Shimotsuga-gun, Tochigi, Japan.
2 Division of General Medicine (Notomi, Harada), Showa Medical University Hospital, Shinagawa-ku, Tokyo, Japan; Diagnostic and Generalist Medicine (Harada), Dokkyo Medical University Hospital, Shimotsuga-gun, Tochigi, Japan hrdtaku@gmail.com.