PT - JOURNAL ARTICLE AU - Muhammad Ahsan Zafar AU - Ashley Cattran AU - Rachel Baker AU - Roman Jandarov AU - Ralph J Panos TI - A Hands-Free, Oral Positive Expiratory Pressure Device for Exertional Dyspnea and Desaturation in COPD AID - 10.4187/respcare.10278 DP - 2023 Mar 01 TA - Respiratory Care PG - 408--412 VI - 68 IP - 3 4099 - http://rc.rcjournal.com/content/68/3/408.short 4100 - http://rc.rcjournal.com/content/68/3/408.full