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Higginson IJ, Gao W, Saleem TZ, Chaudhuri KR, Burman R, McCrone P, Leigh PN. Symptoms and Quality of Life in Late Stage Parkinson Syndromes: A Longitudinal Community Study of Predictive Factors. PLoS ONE. 2012 Nov 07;7(11):e46327. doi: 10.1371/journal.pone.0046327. |