About the Authors

Irene Pichler

Contributed equally to this work with: Irene Pichler, Fabiola Del Greco M.

irene.pichler@eurac.edu (IP); cosetta.minelli@imperial.ac.uk (CM)

Affiliation Respiratory Epidemiology and Public Health, National Heart and Lung Institute, Imperial College, London, United Kingdom

Fabiola Del Greco M.

Contributed equally to this work with: Irene Pichler, Fabiola Del Greco M.

Affiliation Respiratory Epidemiology and Public Health, National Heart and Lung Institute, Imperial College, London, United Kingdom

Martin Gögele

Affiliation Respiratory Epidemiology and Public Health, National Heart and Lung Institute, Imperial College, London, United Kingdom

Christina M. Lill

Affiliations Neuropsychiatric Genetics Group, Department of Vertebrate Genomics, Max Planck Institute for Molecular Genetics, Berlin, Germany, Department of Neurology, Medical Center of the Johannes Gutenberg-University, Mainz, Germany

Lars Bertram

Affiliation Neuropsychiatric Genetics Group, Department of Vertebrate Genomics, Max Planck Institute for Molecular Genetics, Berlin, Germany

Chuong B. Do

Affiliation 23andMe, Inc., Mountain View, California, United States of America

Nicholas Eriksson

Affiliation 23andMe, Inc., Mountain View, California, United States of America

Tatiana Foroud

Affiliation Indiana University School of Medicine, Indianapolis, Indiana, United States of America

Richard H. Myers

Affiliation Department of Neurology, Boston University School of Medicine, Boston, Massachusetts, United States of America

PD GWAS Consortium
Michael Nalls

Affiliation Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, Maryland, United States of America

Margaux F. Keller

Affiliations Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, Maryland, United States of America, Department of Biological Anthropology, Temple University, Philadelphia, Pennsylvania, United States of America

International Parkinson's Disease Genomics Consortium
Wellcome Trust Case Control Consortium 2
Beben Benyamin

Affiliations Queensland Institute of Medical Research, Brisbane, Queensland, Australia, Queensland Brain Institute, The University of Queensland, Queensland, Australia

John B. Whitfield

Affiliation Queensland Institute of Medical Research, Brisbane, Queensland, Australia

Genetics of Iron Status Consortium
Peter P. Pramstaller

Affiliations Respiratory Epidemiology and Public Health, National Heart and Lung Institute, Imperial College, London, United Kingdom, Department of Neurology, General Central Hospital, Bolzano, Italy, Department of Neurology, University of Lübeck, Lübeck, Germany

Andrew A. Hicks

Affiliation Respiratory Epidemiology and Public Health, National Heart and Lung Institute, Imperial College, London, United Kingdom

John R. Thompson

Affiliation Department of Health Sciences, University of Leicester, Leicester, United Kingdom

Cosetta Minelli

irene.pichler@eurac.edu (IP); cosetta.minelli@imperial.ac.uk (CM)

Affiliation Respiratory Epidemiology and Public Health, National Heart and Lung Institute, Imperial College, London, United Kingdom

Competing Interests

CM is a member of the Editorial Board of PLOS Medicine. NE and CBD are or have been employed by 23andMe and own stock options in the company. TF serves on Research Competitiveness Program for the American Association for the Advancement of Science; Study Sections, Review Panels, Board of Scientific Counselors for NIH; Scientific Advisory Board for University of Colorado; and the NIA's Long Life Family Study Observational Study Monitoring Board. All other authors have declared that no competing interests exist.

Author Contributions

¶ Membership of the PD GWAS Consortium, the International Parkinson's Disease Genomics Consortium, the Wellcome Trust Case Control Consortium 2, and the Genetics of Iron Status Consortium is provided in the Acknowledgments

Conceived and designed the experiments: CM IP FDM. Analyzed the data: FDM CM MG. Wrote the first draft of the manuscript: IP CM. Contributed to the writing of the manuscript: CM AAH JT. ICMJE criteria for authorship read and met: IP FDM MG CML LB CBD NE TF RHM MN MFK BB JBW PPP AAH JT CM. Agree with manuscript results and conclusions: IP FDM MG CML LB CBD NE TF RHM MN MFK BB JBW PPP AAH JT CM. Contributed data: CML LB CBD NE TF RHM MN MFK BB JBW PPP.