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Martin RC, Okonkwo OC, Hill J, Griffith HR, Triebel K, Bartolucci A, Nicholas AP, Watts RL, Stover N, Harrell LE, Clark D, Marson DC.Martin RC, et al.Mov Disord. 2008 Oct 15;23(13):1867-74. doi: 10.1002/mds.22170.Mov Disord. 2008.PMID: 18759361Free PMC article.