Published on in Vol 23, No 12 (2021): December
1 Agency for Toxic Substances and Disease Registry, Centers for Disease Control and Prevention, Atlanta, GA, United States
2 Sean M Healey & AMG Center for ALS, Massachusetts General Hospital, Boston, MA, United States
3 Spaulding Rehabilitation Hospital, Harvard Medical School, Boston, MA, United States
4 Department of Neurology, Columbia University College of Physicians and Surgeons, New York City, NY, United States
5 Department of Neurology, Duke University School of Medicine, Durham, NC, United States