(Nature Research, 2020) Pérez Soriano, Alexandra; Arnal, Magdalena; Botta Orfila, Teresa; Giraldo, Darly; Fernández, Manel; Compta, Yaroslau; Fernández-Santiago, Ruben; Ezquerra, Mario; Tartaglia, Gian Gaetano; Martí, M. Josep; Catalan multiple system atrophy-registry (CMSAR)