Deja R Rose1, Jeffrey A Cohen2. 1. Mellen Center for Multiple Sclerosis Treatment and Research, Department of Neurology, Neurological Institute, Cleveland Clinic, Cleveland, OH 44915, USA. 2. Mellen Center for Multiple Sclerosis Treatment and Research, Department of Neurology, Neurological Institute, Cleveland Clinic, Cleveland, OH 44915, USA. Electronic address: cohenj@ccf.org.