 He's also one of the co-authors of Ending Parkinson's Disease, a Prescription for Action. Dr. Dorsey, let's start with maybe a bit of a primer for those who may not know everything there is to know about Parkinson's disease. Tell us a bit about the disease and the typical effects of it. Sure. So Parkinson's disease is now the world's fastest growing brain disorder, faster growing than even an Alzheimer's disease.