Correlates of Excessive Daytime Sleepiness in De Novo Parkinson’s Disease: A Case Control Study

Simuni T, Caspell-Garcia C, Coffey C, Chahine LM, Lasch S, Oertel WH, Mayer G, Hogl B, Postuma R, Videnovic A, Amara AW, and Marek K for the PPMI Sleep Working Group on Behalf of the PPMI Investigators