Lilly CM, Aljawadi M, Badawi O, Onukwugha E, Tom SE, Magder LS, Harris I. Comparative Effectiveness of Proton Pump?Inhibitors vs Histamine Type 2 Receptor Blockers for Preventing Clinically Important Gastrointestinal Bleeding During?Intensive?Care: A Population-Based Study. Chest. 2018 09; 154(3):557-566.