Corrigendum: Alterations of the Gut Microbiota in Multiple System Atrophy Patients. Alzforum, 28 Feb 2020 Wan L, Zhou X, Wang C, Chen Z, Peng H, Hou X, Peng Y, Wang P, Li T, Yuan H, Shi Y, Hou X, Xu K, Xie Y, He L, Xia K, Tang B…