1. Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
2. UCSF Weill Institute for Neurosciences, University of California San Francisco, San Francisco, CA, USA
3. Center for Biomedical Research, Population Council, New York, NY, USA
4. Katholisches Klinikum Bochum GmbH, Nordrhein-Westfalen, Bochum, Germany
5. Brigham and Women’s Hospital, Boston, MA, USA/ Harvard Medical School, Boston, MA, USA
6. Danish Multiple Sclerosis Center, University Hospital Boston, MA, USA/ Rigshospitalet, Copenhagen, Denmark
7. Clinic of Reproductive Endocrinology, University Hospital Zürich, Zürich, Switzerland
8. Clinical Epidemiology and Biostatistics, School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
9. Department of Clinical, Surgical, Diagnostic, and Pediatric Sciences, University of Pavia, Pavia, Italy
10. Research Center of Reproductive Medicine, IRCCS San Matteo Foundation, Pavia, Italy
11. Department of Regional Research, University of Southern Denmark, Odense, Denmark
12. MS-Clinic of Southern Jutland (Aabenraa, Esbjerg, Kolding), Sønderborg, Denmark
13. Southern Health & Social Care Trust, Portadown, Northern Ireland
14. Istanbul University-Cerrahpasa, Florence Nightingale Faculty of Nursing, Istanbul University-Cerrahpasa, Istanbul, Turkey
15. EMD Serono Research & Development Institute, Inc., Billerica, MA, USA
16. Unit of Endocrinology, Department of Medical Specialties, University Hospital and Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy