Affiliation: | (1) The 3rd Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113 Tokyo, Japan;(2) The 1st Department of Internal Medicine, Saitama Medical College, Morohongo 38, 350-04 Iruma-gun, Saitama, Japan;(3) Division of Pathology and Physiology, National Institute of Radiological Sciences, Anagawa, 280 Chiba, Japan;(4) Department of Virology and Rickettsiology, National Institute of Health, Shinagawa, 141 Tokyo, Japan |