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