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Hepp DH, da Hora CC, Koene T, Uitdehaag BM, van den Heuvel OA, Klein M, van de Berg WD, Berendse HW, Foncke EM.Hepp DH, et al.Parkinsonism Relat Disord. 2013 Sep;19(9):795-9. doi: 10.1016/j.parkreldis.2013.04.026. Epub 2013 May 21.Parkinsonism Relat Disord. 2013.PMID: 23706540