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Louis ED, Hafeman D, Parvez F, Liu X, Alcalay RN, Islam T, Ahmed A, Siddique AB, Patwary TI, Melkonian S, Argos M, Levy D, Ahsan H.Louis ED, et al.Mov Disord. 2011 Jul;26(8):1515-20. doi: 10.1002/mds.23674. Epub 2011 Mar 25.Mov Disord. 2011.PMID: 21442657Free PMC article.