[1] Grp Vacanas Soc Espanola Epidemiol, Barcelona, Spain
[2] CIBER Epidemiol & Salad Pabl CIBERESP, Madrid, Spain
[3] Inst Recerca Biomed Lleida, Lieida, Spain
[4] Agencia Salud Pabl Catuluna, Barcelona, Spain
[5] Inst Salad Pabl Navarra, Pamplona, Spain
[6] Direcc Gen Salad Publ, Madrid, Spain
[7] Univ Alicante, Catedra Balmis Vacanol, Alicante, Spain
[8] Univ Barcelona, Dept Med, Barcelona, Spain