What is gastroesophageal reflux disease (GERD). American Gastroenterological Association. http://www.gastro.org/attachments/6320/GERD_Design_All.pdf. Updated April 2016. Accessed July 2016.
US Department of Health and Human Services. National Institutes of Health. National Institute of Diabetes and Digestive and Kidney Diseases. Definition and facts for gastroesophageal reflux (GER) and gastroesophageal reflux disease (GERD). http://www.niddk.nih.gov/health-information/health-topics/digestive-diseases/ger-and-gerd-in-adults/Pages/definition-facts.aspx. Updated November 13, 2014. Accessed July 2016.
Heartburn overview. American Academy of Family Physicians. http://familydoctor.org/online/famdocen/home/common/digestive/disorders/087.html. Updated March 2014. Accessed July 2016.