Commentary: The Influence of Proton Pump Inhibitors on the Fecal Microbiome of Infants with Gastroesophageal Reflux-A Prospective Longitudinal Interventional Study - Drall, Kelsea M.; Tun, Hein M.; Kozyrskyj, Anita L. (Frontiers in Cellular and Infection Microbiology, 2018)