[1] Inst Hlth Res Aragon IIS Aragon, Aragonese Primary Care Res Grp GAIAP, Zaragoza, Spain
[2] Univ Zaragoza, Dept Psychol & Sociol, Zaragoza, Spain
[3] Res Network Chron, Carlos III Hlth Inst, Primary Care & Hlth Promot RICAPPS, Madrid, Spain
[4] Univ Lancaster, Fac Hlth & Med, Ctr Hlth Inequal Res, Lancaster, England
[5] Hlth Res Inst Balear Isl IdISBa, Palma De Mallorca, Spain
[6] Balear Isl Hlth Serv, Primary Care Res Unit Mallorca, Palma De Mallorca, Spain
[7] Univ Zaragoza, Dept Med Psychiat & Dermatol, Zaragoza, Spain