Chandra, Dian Novita, Faculty of Medicine, Universitas Indonesia, Dr. Cipto Mangunkusumo Hospital Chandra, Dian Novita, Faculty of Medicine, Universitas Indonesia-Dr. Cipto Mangunkusumo General Hospital Chandra, Dian Novita, Faculty of Medicine, Universitas Indonesia-Dr. Cipto Mangunkusumo Hospital Chandra, Dian Novita, Universitas Indonesia Chandra, Dian Novita, University of Indonesia Cheng, William, Child Health Department, Faculty of Medicine, Universitas Indonesia-Cipto Mangunkusumo Hospital, Jakarta, Indonesia Christabelle, Marie, Faculty of Medicine Universitas Indonesia Christanti, Jessica, Faculty of Medicine, Soegijapranata Catholic University, Semarang, Indonesia Christianto, Febe, dr Kariadi Central Hospital, semarang Christy, Eleonora Mitaning, Universitas Indonesia