Dr. Aleksandar Videnovic is Assistant Professor of Neurology at Northwestern University Feinberg School of Medicine in Chicago, USA. His clinical and research expertise is in Parkinson's Disease and movement disorders and in Sleep Medicine. Dr. Videnovic's research has been focused on sleep dysfunctions in movement disorders with an emphasis on Parkinson's disease. His research is supported by the United States National Institute of Health, the American Academy of Neurology Foundation, the Michael J. Fox Foundation for Parkinson Research, and the National Parkinson Foundation. Dr. Birgit Högl is Professor of Neurology at Innsbruck Medical University in Innsbruck, Austria. She is a world-renowned expert in the field of Sleep Medicine. Professor Högl has authored many landmark studies related to the interface of sleep and movement disorders, in particular Parkinson's disease, REM Sleep Behavior Disorder and Restless Legs Syndrome.