Oscillatory positive expiratory pressure therapy in COPD (O-COPD): a randomised controlled trial.
Saeed Mardy AlghamdiAbdullah S AlsulayyimAli M AlasmariKeir Elmslie James PhilipSara C ButteryWinston A S BanyaMichael I PolkeySurinder S BirringNicholas S HopkinsonPublished in: Thorax (2022)
ISRCTN44651852.