1. Department of Neurology, Mayo Clinic, Rochester, MN 55905, USA
2. Department of Radiology, Mayo Clinic, Rochester, MN 55905, USA
3. Center for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, Rochester, MN 55905, USA
4. Women’s Health Research Center, Mayo Clinic, Rochester, MN 55905, USA
5. Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN 55905, USA
6. Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, MN 55905, USA