Gastro-oesophageal reflux disease (GERD) is one of the commonest diseases of Western populations, affecting 20 to 30% of adults. GERD is multifaceted and the classical oesophageal symptoms such as heartburn and regurgitation often overlap with atypical symptoms that impact upon the respiratory system and airways.

This is referred to as extra-oesophageal reflux disease (EERD), or laryngopharyngeal reflux (LPR), which manifests as chronic cough, laryngitis, hoarseness, voice disorders and asthma.

Aliment Pharmacol Ther. 2011 Apr;33 Suppl 1:1-71
Authors: Pearson JP, Parikh S, Orlando RC, Johnston N, Allen J, Tinling SP, Johnston N, Belafsky P, Arevalo LF, Sharma N, Castell DO, Fox M, Harding SM, Morice AH, Watson MG, Shields MD, Bateman N, McCallion WA, van Wijk MP, Wenzl TG, Karkos PD, Belafsky PC
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