1. Medicine Use and Shifting Costs of Healthcare http://www.imshealth.com/deployedfiles/imshealth/Global/Content/Corporate/IMS%20Health%20Institute/Reports/Secure/IIHI_US_Use_of_Meds_for_2013.pdf
2. National use of proton pump inhibitors from 2007 to 2011;Johansen;JAMA Intern Med,2014
3. Proton Pump Inhibitors (antacids): Possible Risk of Clostridium difficile-Associated Diarrhea http://www.healthycanadians.gc.ca/recall-alert-rappel-avis/hc-sc/2012/13651a-eng.php
4. Proton Pump Inhibitors: Hypomagnesemia Accompanied by Hypocalcemia and Hypokalemia http://www.hc-sc.gc.ca/dhp-mps/medeff/bulletin/carn-bcei_v21n3-eng.php#_Proton_pump_inhibitors
5. http://www.fda.gov/Drugs/DrugSafety/PostmarketDrugSafetyInformationforPatientsandProviders/ucm213206.htm