3.4. Analysis.
Comparison 3 Endobronchial valves versus medical therapy, Outcome 4 % Change in FEV1 (stratified by collateral ventilation, endobronchial valves).
Comparison 3 Endobronchial valves versus medical therapy, Outcome 4 % Change in FEV1 (stratified by collateral ventilation, endobronchial valves).