Diana Sunardi, Faculty of Medicine, Universitas Indonesia – Dr. Cipto Mangunkusumo General Hospital Jl Salemba Raya no 6, Jakarta 10430, Indonesia Krisadelfa Sutanto, Faculty of Medicine, University of Indonesia, Dr Cipto Mangunkusumo General Hospital Noormanto, Pediatric Cardiology Division, Department of Child Health Novi Silvia Hardiany, University of Indonesia Nurul Ratna Mutu Manikam, Faculty of Medicine, University of Indonesia, Dr Cipto Mangunkusumo General Hospital Riwanto, Medical Faculty, Diponegoro University, Semarang Wiji Lestari, University of Indonesia