1. ISGlobal, Barcelona, Spain
2. Universitat Pompeu Fabra (UPF), Barcelona, Spain
3. CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
4. Measure, Model & Manage Bioresponses (M3-BIORES), Department of Biosystems, KU Leuven, Leuven, Belgium
5. Physiotherapy Department, University of Deusto, Donostia – San Sebastian, Spain
6. Respiratory Clinic Institute, Hospital Clinic of Barcelona, Barcelona, Spain
7. Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
8. Institute for Risk Assessment Sciences (IRAS), Division of Environmental Epidemiology (EEPI), Utrecht University, Utrecht, the Netherlands