Surjono, E., Firmansyah, A. and Batubara, J. (2016) “Knowledge of pediatrician on gastroesophageal reflux/gastroesophageal reflux disease in children: a preliminary study”, Paediatrica Indonesiana, 50(6), pp. 336-9. doi: 10.14238/pi50.6.2010.336-9.