1. Division of Neurology, Toronto Western Hospital, University of Toronto, Canada (A.P.).
2. Department of Medicine (Neurology), Hamilton Health Sciences, McMaster University, Canada (L.C.).
3. Department of Neurology, Wake Forest Baptist Medical Center Health (C.D.B.).
4. Department of Internal Medicine and Emergency, Santa Maria della Misericordia Hospital, University of Perugia, Italy (V.C.).
5. Department of Physical Medicine & Rehabilitation, Harvard Medical School (J.K.S.).