Dr. Alexis Elbaz attended medical school in Paris (France) and specialized as a movement disorder neurologist. He then obtained a PhD degree in epidemiology. He works as a research professor at Inserm (Centre for Research in Epidemiology and Population Health, Paris), and practices in movement disorders at the Pitié-Salpêtrière hospital (Paris). He has published extensively on the epidemiology of Parkinson's disease and motor aging, with a focus on elucidating potentially modifiable environmental risk factors and on the interaction of these risk factors with genetic susceptibility. He has performed several large-scale studies on PD in France in order to improve knowledge on the cause of Parkinson's disease and the factors that account for the heterogeneity in disease course and prognosis, and he is a founding member of the Geo-PD consortium.