[1] Karolinska Inst, Div Social Med, Dept Publ Hlth Sci, S-17176 Stockholm, Sweden
[2] Italian Natl Inst Stat, Piedmont Reg Off, Turin, Italy
[3] Univ Liverpool, Div Publ Hlth, Liverpool L69 3GB, Merseyside, England
[4] Univ Turin, Dept Clin & Biol Sci, I-10095 Grugliasco, Italy
[5] Stockholm Univ, Karolinska Inst, Ctr Hlth Equ Studies, CHESS, S-10691 Stockholm, Sweden
[6] Inst Futures Studies, S-10131 Stockholm, Sweden