1. From the Departments of Neurology (J.D., Z.K.W.) and Neuroscience (J.D., P.J., W.-L.L., D.W.D.), Mayo Clinic, Jacksonville, FL; Division of Neurological and Psychiatric Nursing (J.D.), Faculty of Health Sciences, Medical University of Gdansk; and Neurology Department (J.D.), St Adalbert Hospital, Copernicus PL Ltd., Gdansk, Poland.