Copyright © American Speech-Language-Hearing Association From: The Effects of Hyper- and Hypocapnia on Phonatory Laryngeal Airway Resistance in Women J Speech Lang Hear Res. 2015;58(3):638-652. doi:10.1044/2015_JSLHR-S-13-0270 Legend: Participant flowchart. VHI = Voice Handicap Index-10, RSI = Reflux Symptom Index, PFT = pulmonary function test, Rlaw = phonatory laryngeal airway resistance, PetCO2 = end-tidal carbon dioxide. Date of download: 10/31/2017 Copyright © American Speech-Language-Hearing Association