Competing Interests: N. Jurkute reports consulting fees from Chiesi. W. Ondo reports research grants from Biogen, Sun, Restless Legs Syndrome Foundation, Parkinson's Study Group, Dystonia Coalition (NIH), Cerevel, SCION, and Harmony; honorarium for speaking bureau from TEVA, ACADIA, Acorda, Neurocrine, Supernus, Allergan, and Kyowa Kirin; consulting fees from Merz, Sage, Jazz, XWPharma, Neurocrine, Emalex, Supernus, Amneal, and Revance; and royalties from the books Movement Disorders in Psychiatry, and UpToDate. The remaining authors report no conflicts of interest.