REM Sleep Without Atonia and Gait Impairment in People with Mild-to-Moderate Parkinson's Disease. - Amundsen-Huffmaster, Sommer L.; Petrucci, Matthew N.; Linn-Evans, Maria E.; Chung, Jae Woo; Howell, Michael J.; Videnovic, Aleksandar; Tuite, Paul J.; Cooper, Scott E.; MacKinnon, Colum D. (Journal of Parkinson's Disease, 2021)