Compared to PT group with high-frequency chest wall oscillation (HFCWO)  what was the result of the best pharmacological therapy (PT) and Intrapulmonary percussive ventilation (IPV) on TLC and TLC%, RV and RV%, and DLCO, MIP, and MEP?
 Moreover, IPV patients showed an improvement in BCSS (p<0.001) and CAT (p<0.02) scores in comparison with HFCWO