Institution: | (1) Institute of Basic Medical Sciences, University of Tsukuba, 305 Tsukuba, Ibaraki-ken, Japan;(2) Department of Transfusion Medicine and Immunohematology, Faculty of Medicine, Uniersity of Tokyo, 7 Hongo, Bunkyo-ku, 113 Tokyo, Japan;(3) Department of Research, Japanese Red Cross Central Blood Center, 4-1-31 Hiroo, Shibuya-ku, 150 Tokyo, Japan |