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 BCSS and CAT scores?
 Moreover, IPV patients showed an improvement in BCSS (p<0.001) and CAT (p<0.02) scores in comparison with HFCWO