[1] Chiba Univ, Dept Publ Hlth, Chiba, Japan
[2] Chiba Univ, Dept Pediat, Chiba, Japan
[3] Chiba Univ, Grad Sch Med, Chiba, Japan
[4] Tokyo Womens Med Univ, Yachiyo Med Ctr, Dept Pediat, Chiba, Japan
[5] Wakayama Med Univ Med, Dept Pediat, Wakayama, Japan
[6] NTT Sapporo Med Ctr, Dept Pediat, Sapporo, Hokkaido, Japan
[7] Chiba Cardiovasc Ctr, Dept Pediat, Chiba, Japan
[8] Oriono Clin, Sakai, Osaka, Japan
[9] Japanese Red Cross Kumamoto Hosp, Dept Pediat, Kumamoto, Japan
[10] Showa Univ, Northern Yokohama Hosp, Dept Pediat, Yokohama, Kanagawa, Japan
[11] Hiroshima City Hiroshima Citizens Hosp, Dept Pediat Cardiol, Hiroshima, Japan
[12] Natl Ctr Global Hlth & Med, Dept Pediat, Tokyo, Japan
[13] Kimitsu Chuo Hosp, Dept Pediat, Chiba, Japan
[14] Kumamoto Reg Med Ctr, Dept Pediat, Kumamoto, Japan
[15] Funabashi Municipal Med Ctr, Dept Pediat, Funabashi, Chiba, Japan
[16] Okinawa Prefectural Nanbu Med Ctr, Dept Pediat Cardiol, Okinawa, Japan
[17] Childrens Med Ctr, Okinawa, Japan
[18] Nihon Univ, Itabashi Hosp, Dept Pediat, Tokyo, Japan
[19] Ehime Prefectural Cent Hosp, Dept Pediat, Matsuyama, Ehime, Japan
[20] Kagoshima City Hosp, Dept Pediat, Kagoshima, Japan
[21] Takatsuki Gen Hosp, Dept Pediat, Osaka, Japan
[22] Kawasaki Med Sch Hosp, Dept Pediat, Okayama, Japan
[23] Natl Ctr Child Hlth & Dev, Dept Gen Pediat & Interdisciplinary Med, Tokyo, Japan
[24] Toho Univ, Dept Pediat, Tokyo, Japan
[25] Univ Toyama, Grad Sch Med, Dept Pediat, Toyama, Japan
[26] Hokkaido Univ Hosp, Dept Pediat, Sapporo, Hokkaido, Japan
[27] Ehime Univ, Grad Sch Med, Dept Reg Pediat & Perinatol, Matsuyama, Ehime, Japan
[28] Komatsu Municipal Hosp, Dept Pediat, Komatsu, Ishikawa, Japan
[29] Chiba Univ Hosp, Clin Res Ctr, Chiba, Japan