| http://www.w3.org/ns/prov#value | - GERD, or gastroesophageal reflux disease is caused when a weakness or malfunction of the lower esophageal sphincter allows stomach acid to reflux into the esophagus, irritating the lining of the esophagus and causing severe discomfort and symptoms such as heartburn, difficulty swallowing, nausea and vomiting.
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