Tsutsumi, Hiroyuki M.D.; Kamazaki, Hodaka M.D.; Nakata, Shuji M.D.; Nagao, Masayoshi M.D.; Chiba, Shunzo M.D.; Imai, Shosuke M.D.; Osato, Toyoro M.D.
Department of Pediatrics, School of Medicine, Sapporo Medical University (HT, HK, SN, MN, SC) Department of Virology, Cancer Institute, Hokkaido University School of Medicine (SI, TO), Sapporo, Japan
