1. Division of Medical and Molecular Genetics, Guy’s Hospital, London Bridge, London SE1 9RT, UK
2. Medical Genetics, Department of Medicine and Therapeutics, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
3. Institute of Pathology, University of Pisa, Via Roma, 57, Pisa, Italy
4. Division of Epidemiology, German Cancer Research Centre, Im Neuenheimer Feld 280, D-69120 Heidelberg 1, Germany
5. CRC Genetic Epidemiology Research Group, Wessex Regional Genetics Service, Southampton SO9 4HA, UK
6. Medical Genetics, St. Mary’s Hospital, Hathersage Road, Manchester M13 0JH, UK
7. The Norwegian Radium Hospital, N-0310 Oslo, Norway
8. Department of Medical Genetics, City Hospital, Belfast, UK
9. School of Biological and Medical Sciences, Bute Medical Building, St Andrews, Fife KY16 9TS, UK
10. Unité de Génétique Oncologique, Institut Curie - Section Medicale, 26 rue d'Ulm, 75231 Paris cedex 05, France
11. Foundation for the Detection of Hereditary Tumours, c/o University Hospital, Rijnsburgerweg 10, 2333 AA Leiden, The Netherlands