1. METHARISC Group USR Girona IdIAP Gol i Gorina Girona Spain
2. Research Group on Statistics, Econometrics and Health (GRECS) University of Girona Girona Spain
3. CIBER of Epidemiology and Public Health (CIBERESP) Madrid Spain
4. Faculty of Nursing University of Girona Girona Spain
5. USR Barcelona IdIAP Gol i Gorina Barcelona Spain
6. Ophthalmology Service University Hospital Sant Joan Institut d'Investigació Sanitària Pere Virgili (IISPV) University Rovira i Virgili Reus Spain
7. Department of Medical Sciences University of Girona Girona Spain