Pontine calcification in late stage cerebellar multiple system atrophy: a marker of synucleinopathy neurodegeneration? - Pedroso, José Luiz; Barsottini, Orlando G.; Knobel, Marcos; Handfas, Benjamin Wolf; Rocha, Antonio J.; Knobel, Elias (Arquivos de Neuro-Psiquiatria, 2017)