1. Department of Neurology, Neuromuscular Centre Nijmegen Radboud University Medical Center Nijmegen The Netherlands
2. Department of Clinical Genetics Leiden University Medical Center Leiden the Netherlands
3. Department of Clinical Genetics Maastricht University Medical Centre+ Maastricht the Netherlands
4. Department of Neurology Leiden University Medical Center Leiden the Netherlands
5. Department of Obstetrics and Gynaecology Radboud University Medical Center Nijmegen the Netherlands
6. Department of Neurology Zuyderland Medical Centre Heerlen the Netherlands