Affiliation: | National Center for Global Health and Medicine, Tokyo, Japan (Y. Miyazato, K. Yamamoto, G. Yamada, S. Kubota, M. Ishikane, M. Ueno, A. Matsunaga, T. Miyoshi-Akiyama, Y. Ishizaka, N. Ohmagari);National Center for Global Health and Medicine, Chiba, Japan (M. Sugiyama) |