Beaumont M, Forget P, Couturaud F, Reychler G. Effects of inspiratory muscle training in COPD patients: a systematic review and meta-analysis.
a) Investigating the efficacy of bronchodilators in COPD
b) Analyzing the impact of exercise on lung function in COPD
c) Evaluating the effectiveness of inspiratory muscle training in COPD
d) Assessing the role of surgery in managing COPD symptoms