1. Medical Research Council Epidemiology Unit (R.L., N.G.F., S.J.S., N.J.W., K.K.O.), University of Cambridge, Cambridge CB2 0QQ, United Kingdom
2. Department of Public Health and Primary Care (R.L., K.-T.K.), University of Cambridge, Cambridge CB2 0QQ, United Kingdom
3. Centre for Nutritional Epidemiology in Cancer Prevention (S.A.B.), Cambridge CB1 8RN, United Kingdom
4. Institute of Public Health, and Department of Paediatrics (K.K.O.), University of Cambridge, Cambridge CB2 0QQ, United Kingdom