| Affiliation: | 1. Department of Pulmonology, Center for Home Mechanical Ventilation, University of Groningen, Groningen University Medical Center Groningen (UMCG), Groningen, The Netherlands;2. Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, Groningen University Medical Center Groningen (UMCG), Groningen, The Netherlands;3. Centre de Pneumologie, Institute Universitaire de Cardiologie et de Pneumologie de Québec, Hôpital Laval, Québec, Canada;4. Division of Respiratory Medicine, West Park Healthcare Centre, University of Toronto, Toronto, Canada |
