1. From the British Heart Foundation Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom (D.C., A.M.M., J.C., K.M., N.A., V.T.Y.M., M.M., M.C.P., I.M., A.R., P.W., N.S., K.G.O., C.B.)
2. West of Scotland Heart and Lung Centre, Golden Jubilee National Hospital, Clydebank, United Kingdom (D.C., A.M.M., J.C., K.M., N.A., V.T.Y.M., M.M., M.C.P., H.E., M.L., S.H., S.W., A.D., A.M., I.M., K.G.O., C.B.)
3. Robertson Centre for Biostatistics, University of Glasgow, United Kingdom (C.H., I.F., K.W.).