D.O. Claassen, MD, K.A. Josephs, MD, MST, J.E. Ahlskog, MD, PhD, M.H. Silber, MB, ChB, M. Tippmann-Peikert, MD and B.F. Boeve, MD From the Department of Neurology (D.O.C., K.A.J., J.E.A., M.H.S., M.T.-P., B.F.B.) and Center for Sleep Medicine (M.H.S., M.T.-P., B.F.B.), Mayo Clinic College of Medicine, Rochester, MN. Address correspondence and reprint requests to Dr. Bradley F. Boeve, Department of