Keywords: Parkinson's disease; genetics; genome-wide association; mutation Article Note: Correction added on 6 February 2021, after first online publication: copyright line updated. Relevant conflicts of interest/financial disclosures: Dr. Singleton is supported by the Intramural Research Program of the National Institute on Aging and has received grant support from the Michael J. Fox Foundation for Parkinson's Research and the Aligning Science Across Parkinson's Initiative. He has received royalty payments related to a diagnostic for stroke. Dr. Blauwendraat is supported by the Intramural Research Program of the National Institute on Aging and has received grant support from the Michael J. Fox Foundation for Parkinson's Research and the Aligning Science Across Parkinson's Initiative.