Herala M, Stålenheim G, Bomm G. Effects of Positive Expiratory Pressure (PEP), Continuous Positive Airway Pressure (CPAP) and Hyperventilation in COPD Patients with Chronic Hypercapnea. ujms [Internet]. 2010Jan.18 [cited 2024Dec.3];100(3). Available from: https://ujms.net/index.php/ujms/article/view/6664