1. Centre for Medical Genetics, UZ Brussel, Laarbeeklaan 101,1090 Brussels, Belgium
2. ESHRE Central Office, Meerstraat 60, 1852 Grimbergen, Belgium
3. Reproductive Medicine Unit, Genesis Athens Clinic, 14-16 Papanicoli street, Chalandri, Athens, Greece
4. Department of Reproductive Medicine, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
5. PGD Working Group Maastricht, Department of Clinical Genetics, Maastricht University Medical Centre, PO Box 5800, 6202 AZ Maastricht, The Netherlands
6. Université de Strasbourg, Hôpitaux Universitaires de Strasbourg, Laboratoire de Diagnostic préimplantatoire, CMCO, 19, Rue Louis Pasteur, BP120, 67303 Schiltigheim, France