1. Institute of Human Genetics, Newcastle University, Newcastle upon Tyne, United Kingdom.
2. INSERM, SC11, Paris, France.
3. Scientific Office, Telethon, Milan, Italy.
4. Department of Medical Genetics and Child Development, University of Pecs, Pecs, Hungary.
5. Institute for Medical Statistics and Epidemiology, Technische Universität München, Munich, Germany.
6. Department of Genetic Medicine and Development, University of Geneva Medical School Geneva, Switzerland.
7. Institute of Human Genetics, Helmholtz Center, Munich, Germany.