Atsushi Sato1, Kikuo Isoda2, Takeshi Adachi1. 1. Internal Medicine 1, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan. 2. Internal Medicine 1, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan isoda@ndmc.ac.jp.