1 Neurological Sciences and Cerebrovascular Research Laboratory, Department of Neurology, Neuroscience Area of Hospital La Paz Institute for Health Research-IdiPAZ (La Paz University Hospital, Universidad Autónoma de Madrid), Madrid, Spain.
2 Population Health Science and Policy, Icahn School of Medicine at Mount Sinai, New York, NY, United States.
3 Multiple Sclerosis Group, Neurosciences Area, Biodonostia Health Research Institute, San Sebastian, Spain.