| http://www.w3.org/ns/prov#value | - Although some reflux is normal, excess reflux may damage the lining of the esophagus and cause symptoms such as chest pain, heartburn, difficulty or painful swallowing, cough, hoarseness or asthma.A small (2 millimeter) catheter is inserted through your nose, down the back of your throat and into your esophagus.
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