1. The Danish Multiple Sclerosis Center, Department of Neurology, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, Copenhagen, Denmark
2. Department for Clinical Immunology, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, Copenhagen, Denmark
3. Department of Obstetrics, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, Copenhagen, Denmark