1. The National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
2. University of Southern Denmark, Odense, Denmark
3. Parc Sanitari Sant Joan de Déu, Universitat de Barcelona, Fundació Sant Joan de Déu, CIBERSAM, Barcelona, Spain
4. ICREA, Barcelona, Spain
5. Division of Health Sciences, Warwick Medical School, University of Warwick, Coventry, UK