Lower mortality after early supervised pulmonary rehabilitation following COPD-exacerbations: a systematic review and meta-analysis oleh Camilla Koch Ryrsø, Nina Skavlan Godtfredsen, Linette Marie Kofod, Marie Lavesen, Line Mogensen, Randi Tobberup, Ingeborg Farver-Vestergaard, Henriette Edemann Callesen, Britta Tendal, Peter Lange, Ulrik Winning Iepsen