[1] Univ Tokyo, Div Hlth Serv Promot, Bunkyo ku, Tokyo, Japan
[2] Univ Tokyo Hosp, Pediat Dept, Bunkyo Ku, Tokyo, Japan
[3] St Lukes Int Hosp, Dept Cardiol, Choo Ku, Tokyo, Japan
[4] Hokkaido Univ, Dept Cardiovasc Med, Grad Sch Med, Sapporo, Hokkaido, Japan
[5] Tohoku Univ, Dept Cardiovasc Med, Grad Sch Med, Sendai, Miyagi, Japan
[6] Osaka Univ, Dept Cardiovasc Med, Grad Sch Med, Suita, Osaka, Japan
[7] Kyushu Univ, Dept Cardiovasc Med, Fukuoka, Fukuoka, Japan
[8] Akita Univ, Dept Cardiovasc Med, Grad Sch Med, Akita, Akita, Japan
[9] Univ Toyama, Dept Internal Med 2, Toyama, Toyama, Japan
[10] Chiba Cerebral & Cardiovasc Ctr, Dept Pediat, Ichihara, Chiba, Japan
[11] Nagoya Univ Hosp, Dept Cardiol, Nagoya, Aichi, Japan
[12] Ehime Univ, Grad Sch Med, Dept Cardiol Pulmonol Hypertens & Nephrol, Toonn, Ehime, Japan
[13] Shinshu Univ, Dept Cardiovasc Med, Sch Med, Matsumoto, Nagano, Japan
[14] Mie Univ, Dept Cardiol & Nephrol, Grad Sch Med, Tsu, Mie, Japan
[15] Univ Tsukuba, Div Cardiol, Tsukuba, Ibaragi, Japan
[16] Tenri Hosp, Dept Cardiol, Tenri, Nara, Japan
[17] Gunma Univ, Dept Cardiovasc Med, Grad Sch Med, Maebashi, Gunma, Japan
[18] Saitama Med Univ, Int Med Ctr, Hidaka, Saitama, Japan
[19] Okinawa Prefectural Nanbu Med Ctr, Div Pediat Cardiol, Haebaru, Okinawa, Japan
[20] Showa Univ Hosp, Pediat Heart Dis & Adult Congenital Heart Dis Ctr, Shinagawa Ku, Tokyo, Japan
[21] Osaka City Gen Hosp, Dept Pediat Cardiol, Osaka, Osaka, Japan
[22] Juntendo Univ, Dept Cardiovasc Biol & Med, Grad Sch Med, Bunkyo Ku, Tokyo, Japan
[23] Tokushima Univ, Dept Community Med Cardiol, Grad Sch Biomed Sci, Tokushima, Tokushima, Japan
[24] Gunma Prefectural Cardiovasc Ctr, Div Cardiol, Maebashi, Gunma, Japan
[25] Mito Saiseikai Gen Hosp, Dept Cardiol, Mito, Ibaragi, Japan
[26] Yokohama Rosai Hosp, Dept Cardiol, Yokohama, Kanagawa, Japan
[27] Univ Tokyo Hosp, Cardiovasc Dept, Bunkyo ku, Tokyo, Japan
[28] Natl Cerebral & Cardiovasc Ctr, Dept Pediat Cardiol, Suita, Osaka, Japan
[29] Jichi Med Univ, Shimotsuke, Tochigi, Japan
[30] Univ Tokyo, Div Hlth Serv Promot, 7-3-1 Hongo,Bunkyo Ku, Tokyo 1130033, Japan