[1] Univ Montreal, Dept Social & Prevent Med, Montreal, PQ H3C 3J7, Canada
[2] Inst Neurosci, Natl Res Council, Padova Aging Sect, Padua, Italy
[3] Chaim Sheba Med Ctr, Gertner Hlth Inst, IL-52621 Tel Hashomer, Israel
[4] Vrije Univ Amsterdam, Med Ctr, EMGO Inst LASA, Amsterdam, Netherlands
[5] Univ Tampere, Sch Publ Hlth, FIN-33101 Tampere, Finland
[6] Karolinska Inst, Dept Epidemiol & Biostat, S-10401 Stockholm, Sweden