Ending Parkinson's Disease: A Prescription for ActionIn this "must read" guide (Lonnie Ali), four leading doctors and advocates offer a bold action plan to prevent, care for, and treat Parkinson's disease one of the great health challenges of our time. Brain diseases are now the world's leading source of disability. The fastest growing of these is Parkinson's: the number of impacted patients has doubled to more than six million over the last twenty five years and is projected to double again by 2040.