Third was GERD, which was diagnosed as a primary cause of cough in nonasthmatic patients without PR and CRS who complained of typical symptoms, such as heartburn and regurgitation, and had positive results on ambulatory 24-hour esophageal pH monitoring.19 The monitoring was performed with a dual-channel antimony pH catheter connected to an ambulatory recorder Mark III Digitrapper (Synectics Medical, Inc, Chicago, Ill). All the patients were examined by a single experienced otorhinolaryngologist blinded to the results of pH monitoring. GERD-related laryngitis was diagnosed when at least 2 symptoms of hoarseness, globus pharyngeus, dysphagia, throat clearing, or soreness were combined with endoscopic evidence of at least 2 of the following: subglottic edema, posterior laryngitis, or laryngeal diffuse edema or hyperemia.20