[1] Niigata Univ, Dept Pediat, 757 Asahimachidori Ichibancho, Niigata, Niigata 9518510, Japan
[2] Seirei Hamamatsu Gen Hosp, Dept Adult Congenital Heart Dis, 2-12-12 Sumiyoshi, Hamamatsu, Shizuoka 4308558, Japan
[3] Seirei Hamamatsu Gen Hosp, Dept Pediat Cardiol, 2-12-12 Sumiyoshi, Hammatsu, Shizuoka 4308558, Japan
[4] Niigata Prefectural Cent Hosp, Dept Cardiol, 205 Shinnancho, Joetsu, Niigata 9430192, Japan
[5] Niigata Univ, Dept Cardiovasc Surg, 757 Asahimachidori Ichibancho, Niigata, Niigata 9518510, Japan