Effects of a new walking aid on 6MWD in COPD patients
Anouk W. Vaes, Janneke Annegarn, Kenneth Meijer, Martijn W. Cuijpers, Frits M.E. Franssen, Jozé Wiechert, Emiel F.M. Wouters, Martijn A. Spruit
European Respiratory Journal Sep 2011, 38 (Suppl 55) 209;