1. John L. Trotter Multiple Sclerosis Center, Department of Neurology, School of Medicine, Washington University in St. Louis, St. Louis, MO, USA/Division of Neuroimmunology, Department of Neurology, University of Utah Health, Salt Lake City, UT, USA
2. Division of Biostatistics, School of Medicine, Washington University in St. Louis, St. Louis, MO, USA
3. John L. Trotter Multiple Sclerosis Center, Department of Neurology, School of Medicine, Washington University in St. Louis, St. Louis, MO, USA/Department of Neurology, School of Medicine, Yale University, New Haven, CT, USA
4. John L. Trotter Multiple Sclerosis Center, Department of Neurology, School of Medicine, Washington University in St. Louis, St. Louis, MO, USA