Lazarus, G., Gastrohepatology Division, Department of Child Health, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jl. Salemba 6, Jakarta, 10430, Indonesia; Junaidi, M.C., Gastrohepatology Division, Department of Child Health, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jl. Salemba 6, Jakarta, 10430, Indonesia; Oswari, H., Gastrohepatology Division, Department of Child Health, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jl. Salemba 6, Jakarta, 10430, Indonesia