1. Department of Public Health, General Practice. University of Southern Denmark , Odense , Denmark
2. Primary Care Research Institute Jordi Gol (IDIAPJGol) , Barcelona , Spain
3. CIBER de Enfermedades Infecciosas, Instituto de Salud Carlos III , Madrid , Spain
4. Via Roma Health Centre, Institut Català de la Salut , Barcelona , Spain
5. Jaume I Health Centre, Institut Català de la Salut , Tarragona , Spain
6. University Rovira i Virgili , Reus , Spain
7. Plataforma SCReN, UICEC IDIAPJGol , Barcelona , Spain
8. Balaguer Health Centre, Institut Català de la Salut , Balaguer , Spain
9. Universitat Autònoma de Barcelona , Bellaterra , Spain