[1] Univ Cambridge, MRC Epidemiol Unit, Ctr Diet & Act Res, Cambridge, England
[2] Univ Stirling, Fac Hlth Sci & Sport, Inst Social Mkt, Stirling, Scotland
[3] Newcastle Univ, Inst Hlth & Soc, Newcastle Upon Tyne, Tyne & Wear, England
[4] Newcastle Univ, Human Nutr Res Ctr, Newcastle Upon Tyne, Tyne & Wear, England