1. Economics Department, Insight Health Economics Ltd., 16 Cambrian Road, Richmond, Surrey TW10 6JQ, UK
2. Public Health Department, Hampshire County Council, Elizabeth II Court South, Winchester SO23 8UJ, UK
3. Department of Medical Genetics, University of Aberdeen, Polwarth Building, Foresterhill, Aberdeen AB25 2ZD, UK
4. Wales Heart Research Institute, Cardiff University, Heath Park, Cardiff CF14 4XN, UK
5. Northern Ireland Regional Genetics Centre, Regional Genetics Laboratories, Belfast City Hospital, Lisburn Road, Belfast BT9 7AB, UK
6. Wessex Clinical Genetics Service, University Hospital Southampton NHS Foundation Trust, Princess Anne Hospital, Coxford Road, Southampton SO16 5YA, UK
7. Centre for Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, 5 University Street, London WC1E 6JJ, UK