[1] Teaching Hosp Karapitiya, Pediat Unit, Galle, Sri Lanka
[2] Univ Ruhuna, Dept Community Med, Fac Med, Galle, Sri Lanka
[3] Univ Ruhuna, Dept Pediat, Fac Med, Galle, Sri Lanka
[4] Univ New Mexico, Mind Res Network, Albuquerque, NM USA
[5] Univ New Mexico, Dept Neurol & Pediat, Albuquerque, NM USA
[6] Teaching Hosp Karapitiya, Pediat Neurol Unit, Galle, Sri Lanka