International Multicenter Analysis of Brain Structure Across Clinical Stages of Parkinson's Disease. - Laansma MA; Bright JK; Al-Bachari S; Anderson TJ; Ard T; Assogna F; Baquero KA; Berendse HW; Blair J; Cendes F; Dalrymple-Alford JC; de Bie RMA; et al. (Movement disorders : official journal of the Movement Disorder Society, 2021)