Yohmi, Elizabeth, Aswitha D Boediarso, and Sri Rezeki S Hadinegoro. 2016. “Lactose Malabsorption Based on Breath Hydrogen Test in Children With Recurrent Abdominal Pain”. Paediatrica Indonesiana 44 (6):215-21. https://doi.org/10.14238/pi44.6.2004.215-21.