[1] Bangkok Hosp, Med Ctr, Bangkok Child Hlth Ctr, Bangkok 10310, Thailand
[2] Srinakharinwirot Univ, HRH Princess Maha Chakri Sirindhorn Med Ctr, Fac Med, Div Neurol,Dept Pediat, Nakornnayok, Thailand
[3] Bangkok Heart Hosp, Dept Res & Dev, Bangkok, Thailand
[4] Queen Sawangwattana Hosp, Chon Buri, Thailand
[5] Somdej Prapinklao Hosp, Bangkok, Thailand