Two-year exercise program improves physical function in Parkinson's disease: the PRET-PD randomized clinical trial.
Prodoehl J, Rafferty MR, David FJ, Poon C, Vaillancourt DE, Comella CL, Leurgans SE, Kohrt WM, Corcos DM, Robichaud JA. Two-year exercise program improves physical function in Parkinson's disease: the PRET-PD randomized clinical trial. Neurorehabil Neural Repair. 2015 Feb; 29(2):112-22.