Gunardi H., Pediatric Surgery Division, Department of Surgery, Faculty of Medicine, Universitas Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia; Alatas F.S., Department of Pediatric and Adolescent Health, Faculty of Medicine Universitas Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia; Antarianto R.D., Department of S3 Biomedic, Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia; Rahayatri T.H., Pediatric Surgery Division, Department of Surgery, Faculty of Medicine, Universitas Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia