Published on in Vol 6, No 12 (2018): December

1 Respiratory Division, University Hospitals Leuven , Leuven , BE
2 Department of Rehabilitation Sciences, KU Leuven , Leuven , BE
3 Department of Physiotherapy, LUNEX International University of Health, Exercise and Sports , Differdange , LU
4 ELEGI Colt Laboratory, Centre for Inflammation Research, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh , GB
5 ISGlobal , Barcelona , ES
6 Faculty of Physical Education and Sports Sciences, National and Kapodistrian University of Athens , Athens , GR
7 National Institute for Health Research Respiratory Biomedical Research Unit, Royal Brompton and Harefield National Health Services Foundation Trust and Imperial College , London , GB
8 Epidemiology, Biostatistics and Prevention Institute, University of Zurich , Zurich , CH
9 Groningen Research Institute for Asthma and Chronic Obstructive Pulmonary Disease-Primary Care, Department of General Practice and Elderly Care, University of Groningen, University Medical Center Groningen, Groningen , NL
10 Department of Communication, Universitat Pompeu Fabra , Barcelona , ES
11 Centro de Investigación Biomédica en Red en Epidemiología y Salud Pública , Barcelona , ES
12 Department of Sport, Exercise and Rehabilitation, Faculty of Health and Life Sciences, Northumbria University, Newcastle-upon-Tyne , GB