1. Nuffield Department of Clinical Neurosciences, Oxford, UK
2. Department of Biostatistics, University of North Carolina, Chapel Hill, NC, USA
3. Department of Neurology, Mayo Clinic College of Medicine, 200 First Street S.W., Rochester, Minnesota, USA
4. Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, 200 First Street S.W., Rochester, Minnesota, USA
5. The Walton Centre, NHS Foundation Trust, Liverpool, UK
6. Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
7. Clinical Research Unit, Mayo Clinic College of Medicine, 200 First Street S.W., Rochester, Minnesota, USA
8. Department of Neurology, Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Fort-de-France, Martinique, France
9. Department of Multiple Sclerosis Therapeutics, Fukushima Medical University School of Medicine and Multiple Sclerosis and Neuromyelitis Optica Center, Southern TOHOKU Research Institute for NeuroScience, Koriyama, Japan