Correction: Physical Activity Counselling during Pulmonary Rehabilitation in Patients with COPD: A Randomised Controlled Trial

• Chris Burtin, 
• Daniel Langer, 
• Hans van Remoortel, 
• Heleen Demeyer, 
• Rik Gosselink, 
• Marc Decramer, 
• Fabienne Dobbels, 
• Wim Janssens, 
• Thierry Troosters