T Asakura1, A Higuchi1, N Mori1. 1. Department of General Internal Medicine, National Hospital Organization Tokyo Medical Center, 2-5-1 Higashigaoka Meguro-ku, Tokyo, Japan;Department of Clinical Laboratory, National Hospital Organization Tokyo Medical Center, 2-5-1 Higashigaoka Meguro-ku, Tokyo, Japan;Department of General Internal Medicine, National Hospital Organization Tokyo Medical Center, 2-5-1 Higashigaoka Meguro-ku, Tokyo, Japan. email: nobuaki.m@icloud.com.