[1] Univ Turku, Dept Publ Hlth, Inst Clin Med, SF-20500 Turku, Finland
[2] Turku City Hosp, Turku, Finland
[3] Univ Turku, Dept Family Med Gen Practice, Inst Clin Med, SF-20500 Turku, Finland
[4] Nord Sch Publ Hlth, Gothenburg, Sweden
[5] Univ Turku, Dept Biostat, Inst Clin Med, SF-20500 Turku, Finland
[6] Univ Turku, Dept Geriatr, Inst Clin Med, SF-20500 Turku, Finland
[7] Karolinska Univ Hosp, Dept Geriatr, Karolinska Inst, Stockholm, Sweden
[8] Turku Univ Hosp, FIN-20520 Turku, Finland
[9] Univ Helsinki, Dept Publ Hlth, FIN-00014 Helsinki, Finland