RBD and hyposmia in Moroccan patients with a synucleinopathy: prevalence and the timing of occurrence in a large cohort.

RBD and hyposmia are both prevalent among Moroccan patients with synucleinopathy and they occur frequently during the prodromal phase. Identifying these premotor signs will improve early and differential diagnosis and enhance our understanding of how a specific synucleinopathy progresses.