About the Authors

Xuemei Huang

Xuemei@psu.edu

Affiliation Departments of Neurology, Neurosurgery, Pharmacology, Radiology, and Kinesiology, Pennsylvania State University-Milton Hershey Medical Center, Hershey, Pennsylvania, United States of America

Peggy Auinger

Affiliation Department of Neurology, Center for Human Experimental Therapeutics, University of Rochester School of Medicine and Dentistry, Rochester, New York, United States of America

Shirley Eberly

Affiliation Department of Biostatistics, University of Rochester School of Medicine and Dentistry, Rochester, New York, United States of America

David Oakes

Affiliation Department of Biostatistics, University of Rochester School of Medicine and Dentistry, Rochester, New York, United States of America

Michael Schwarzschild

Affiliation Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, United States of America

Alberto Ascherio

Affiliation Departments of Nutrition and Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America

Richard Mailman

Affiliation Departments of Neurology and Pharmacology, Pennsylvania State University-Milton Hershey Medical Center, Hershey, Pennsylvania, United States of America

Honglei Chen

Affiliation Epidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, United States of America

for the Parkinson Study Group DATATOP Investigators

The full list of DATATOP investigators/coordinators can be found in the file Supporting Information S1.

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XH PA MS AA RM HC. Performed the experiments: XH PA MS AA RM HC. Analyzed the data: PA SE AA HC. Wrote the paper: XH PA SE DO MS AA RM HC.