Esophageal function and gastroesophageal reflux during sleep and waking in patients with chronic obstructive pulmonary disease.
Orr WC, Shamma-Othman Z, Allen M, Robinson MG. Esophageal function and gastroesophageal reflux during sleep and waking in patients with chronic obstructive pulmonary disease. Chest. 1992 Jun; 101(6):1521-5.