Longitudinal Assessment of Excessive Daytime Sleepiness in Early Parkinson’s Disease

Amara AW, Chahine LM, Caspell-Garcia C, Long JD, Coffey C, Hogl B, Videnovic A, Iranzo A, Mayer G, Foldvary-Schaefer N, Postuma R, Oertel W, Lasch S, Marek K, Simuni T, and the Parkinson’s Progression Markers Initiative