A worldwide study of white matter microstructural alterations in people living with Parkinson’s disease by Owens-Walton, C, Nir, TM, Al-Bachari, S, Ambrogi, S, Anderson, TJ, Aventurato, ÍK, Cendes, F, Chen, Y, Ciullo, V, Cook, P, Dalrymple-Alford, JC, Dirkx, MF, Druzgal, J, Emsley, HCA, Guimarães, R, Haroon, HA, Helmich, RC, Hu, MT, Johansson, ME, Kim, HB, Klein, JC, Laansma, M, Lawrence, KE, Lochner, C, Mackay, C