[1] Imperial Coll London, Publ Hlth Policy Evaluat Unit, London W6 8RP, England
[2] Univ Sao Paulo, Ctr Epidemiol Res Nutr & Hlth, Sao Paulo, SP, Brazil
[3] Univ Sao Paulo, Dept Prevent Med, Sch Med, Sao Paulo, SP, Brazil
[4] Int Agcy Res Canc, Nutr & Metab Branch, Lyon, France