1. Department of General Internal Medicine, Kobe City Medical Center General Hospital , 2-1-1 Minami-machi, Minatojima, Chuo-ku, Kobe City, Hyogo 650-0047 , Japan
2. Department of Pathology, Kobe City Medical Center General Hospital , 2-1-1 Minami-machi, Minatojima, Chuo-ku, Kobe City, Hyogo 650-0047 , Japan