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Snow BJ, Rolfe FL, Lockhart MM, Frampton CM, O'Sullivan JD, Fung V, Smith RA, Murphy MP, Taylor KM; Protect Study Group.Snow BJ, et al.Mov Disord. 2010 Aug 15;25(11):1670-4. doi: 10.1002/mds.23148.Mov Disord. 2010.PMID: 20568096Clinical Trial.