1. British Heart Foundation Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences (A.M.M., P.J.M., K.G.O., M.M., H.E., D.C., C.B.), University of Glasgow, United Kingdom.
2. West of Scotland Heart and Lung Centre, Golden Jubilee National Hospital, Clydebank, Glasgow, United Kingdom (A.M.M., P.J.M., K.G.O., M.L., M.M., H.E., J.P.R., R.G., A.S., K.R., S.H., S.W., D.C., T.J.F., C.B.).
3. Leeds University and Leeds Teaching Hospitals NHS Trust, United Kingdom (C.J.M., J.P.G.).
4. Wolverhampton University Hospital NHS Trust, United Kingdom (J.M.C.).
5. Project Management Unit, Greater Glasgow and Clyde Health Board, United Kingdom (L.G.).
6. Faculty of Medicine, University of Newcastle, Callaghan NSW, Australia (T.J.F.).
7. University Hospital Hairmyres, East Kilbride, United Kingdom (R.A.P.W.).
8. Robertson Centre for Biostatistics (A.M.), University of Glasgow, United Kingdom.