1. University/British Heart Foundation Centre for Cardiovascular Science (A.J.A., R.A., N.Z.H., G.C.J., K.S., D.E.L., B.R.W., R.H.S), University of Edinburgh, Edinburgh EH16 4TJ, Scotland, United Kingdom;
2. Diabetes Centre, Gartnavel General Hospital (G.C.J.), Glasgow, Scotland, United Kingdom;
3. Division of Medical Sciences and Graduate Entry Medicine (K.S.), School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, United Kingdom