Lazarus, G., Gastrohepatology Division, Department of Child Health, Faculty of Medicine, Dr. Cipto Mangunkusumo Hospital, Universitas Indonesia, Jakarta, Indonesia; Francie, J., Gastrohepatology Division, Department of Child Health, Faculty of Medicine, Dr. Cipto Mangunkusumo Hospital, Universitas Indonesia, Jakarta, Indonesia; Roeslani, R.D., Neonatology Division, Department of Child Health, Faculty of Medicine, Dr. Cipto Mangunkusumo Hospital, Universitas Indonesia, Jakarta, Indonesia; Saldi, S.R.F., Clinical Epidemiology and Evidence-Based Unit (CEEBM), Dr. Cipto Mangunkusumo Hospital - Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia; Oswari, H., Gastrohepatology Division, Department of Child Health, Faculty of Medicine, Dr. Cipto Mangunkusumo Hospital, Universitas Indonesia, Jakarta, Indonesia