About the Authors

Nathan Pankratz

npankrat@iupui.edu

Affiliation Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America

Alexandra Dumitriu

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

Kurt N. Hetrick

Affiliation Center for Inherited Disease Research (CIDR), Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America

Mei Sun

Affiliations Center for Human Genetic Research, Massachusetts General Hospital, Boston, Massachusetts, United States of America, Department of Neurology, Harvard Medical School, Boston, Massachusetts, United States of America

Jeanne C. Latourelle

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

Jemma B. Wilk

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

Cheryl Halter

Affiliation Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America

Kimberly F. Doheny

Affiliation Center for Inherited Disease Research (CIDR), Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America

James F. Gusella

Affiliations Center for Human Genetic Research, Massachusetts General Hospital, Boston, Massachusetts, United States of America, Department of Genetics, Harvard Medical School, Boston, Massachusetts, United States of America

William C. Nichols

Affiliations Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America

Richard H. Myers

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

Tatiana Foroud

Affiliation Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America

Anita L. DeStefano

Affiliations Department of Neurology, Boston University School of Medicine, Boston, Massachusetts, United States of America, Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, United States of America

the PSG–PROGENI and GenePD Investigators, Coordinators and Molecular Genetic Laboratories

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: NP AD KNH MS JFG JL JBW RHM TF ALD. Performed the experiments: NP AD KNH MS KFD JFG WCN ALD. Analyzed the data: NP AD JL JBW KNH ALD. Contributed reagents/materials/analysis tools: KNH KFD CH WCN JFG. Wrote the paper: NP AD KNH MS JL JBW CH KFD JFG WCN RHM TF ALD. Take responsibility for the PSG-PROGENI Investigators, Coordinators and Molecular Genetic Laboratories: NP WCN TF. Take responsibility for the GenePD Investigators, Coordinators and Molecular Genetic Laboratories: JFG RHM ALD.