Affiliation: | (1) Present address: Third Department of Internal Medicine, Yamagata University School of Medicine, 2-2-2 Iida-Nishi, 990-23 Yamagata, Japan;(2) Division of Blood Transfusion, Yamagata University School of Medicine, 2-2-2 Iida-Nishi, 990-23 Yamagata, Japan |