Abdul Qayyum Rana, MD, FRCPC is a neurologist with special expertise in Movement Disorders. He is currently the Director of the Parkinson’s Clinic of Eastern Toronto and Movement Disorders Center located in Toronto, Canada. Dr. Rana is also the founding editor-in-chief of the Journal of Parkinsonism and Restless Legs Syndrome and founder of World Parkinson’s Program, a foundation dedicated to improve quality of life of patients with Parkinson’s disease at a global level. Dr. Rana is author of many books including, Neurological Emergencies in Clinical Practice, An Aid to Neuro-ophthalmology, Natural Therapies for Parkinson disease, Neuroradiology in Clinical Practice, Differential Diagnosis of Movement Disorders in Clinical Practice, 99 Faces of Parkinson’s and 50 Ways Parkinson’s Could Affect You. Kelvin L. Chou, MD is a board-certified, fellowship-trained neurologist with expertise in essential tremor and other movement disorders. He is the Thomas H. and Susan C. Brown Early Career Professor in Neurology and Co-Director of the Surgical Therapies Improving Movement (STIM) Program at the University of Michigan. He serves on the Medical Advisory Board of the International Essential Tremor Foundation and is also the author of Deep Brain Stimulation: A New Life for People with Parkinson’s, Dystonia and Essential Tremor.