[1] Hosp San Juan Dios, Geriatr Dept, Zaragoza 50006, Spain
[2] Univ Zaragoza, Geriatr Dept, Zaragoza 50009, Spain
[3] Hlth Res Inst Aragon IISA, Grp B21 23R, Zaragoza 50009, Spain
[4] Network Res Chron Primary Care & Hlth Promot RICAP, RD21 0016 0005, Zaragoza 50015, Spain
[5] Univ Zaragoza, Dept Psychol & Sociol, Zaragoza, Spain
[6] Univ Zaragoza, Med Dept, Zaragoza 50009, Spain
[7] Fundacio Inst Univ Recerca Atencio Primaria Salut, Barcelona 08007, Spain
[8] Univ Autonoma Barcelona, Pharmacol Dept, Bellaterra 08193, Spain
[9] CIBER Enfermedades Infecciosas Inst Carlos III, Madrid 28029, Spain
[10] Aragon Inst Social Serv IASS, Nursing Home, Borja 50540, Spain
[11] Hosp Univ Ramon y Cajal IRYCIS, Geriatr Dept, Madrid 28034, Spain
[12] Hosp Univ La Princesa, Internal Med Dept, Inst Invest Sanitaria IIS Princesa, Madrid 28006, Spain
[13] Res Inst Princesa IIS Princesa, Madrid 28006, Spain
[14] Complejo Hosp Univ Canarias, Pharmacol Dept, Santa Cruz de Tenerife 38320, Spain
[15] Inst Catala Salut, Barcelona 08038, Spain
[16] Univ Southern Denmark, Dept Publ Hlth, Res Unit Gen Practice, DK-5230 Odense, Denmark