1. Is there a relationship between obstructive sleep apnea and gastroesophageal reflux disease? 
Chad A. Morse, Stuart F. Quan, Mary Z. Mays, Colleen Green, George Stephen, Ronnie Fass 
Clinical Gastroenterology and Hepatology 
Volume 2, Issue 9, Pages (September 2004)
DOI: /S (04)
Copyright © 2004 American Gastroenterological Association Terms and Conditions

2. Figure 1
Apnea-hypopnea index plotted against heartburn index (frequency × severity; range, 0–20) shows no discernible relationship between severity of GERD and OSA.
Clinical Gastroenterology and Hepatology 2004 2, DOI: ( /S (04) )
Copyright © 2004 American Gastroenterological Association Terms and Conditions