1. Institute of Cardiovascular and Medical Sciences (P.W., E.B., N.S.), Glasgow G12 8TA, United Kingdom
2. Robertson Centre for Biostatistics (O.D., A.M.), Glasgow G12 8TA, United Kingdom
3. Public Health Nutrition Research Group (G.M., H.M., A.H.), University of Aberdeen, Aberdeen AB24 3FX, United Kingdom
4. Institute of Health and Wellbeing (C.H.), Glasgow G12 8TA, United Kingdom
5. Woodlands Family Medical Centre (M.U.), Stockton-on-Tees TS18 1YE, United Kingdom
6. General Practice and Primary Care (G.W.), University of Glasgow, Glasgow G12 8TA, United Kingdom