About the Authors

Linda M. Polfus

Affiliation Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston, Houston, Texas, United States of America

Jennifer A. Smith

Affiliation Department of Epidemiology, University of Michigan, Ann Arbor, Michigan, United States of America

Lawrence C. Shimmin

Affiliation Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston, Houston, Texas, United States of America

Lawrence F. Bielak

Affiliation Department of Epidemiology, University of Michigan, Ann Arbor, Michigan, United States of America

Alanna C. Morrison

Affiliation Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston, Houston, Texas, United States of America

Sharon L. R. Kardia

Affiliation Department of Epidemiology, University of Michigan, Ann Arbor, Michigan, United States of America

Patricia A. Peyser

Affiliation Department of Epidemiology, University of Michigan, Ann Arbor, Michigan, United States of America

James E. Hixson

James.E.Hixson@uth.tmc.edu

Affiliation Department of Epidemiology, University of Michigan, Ann Arbor, Michigan, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LMP ACM PAP SLRK. Performed the experiments: LMP JAS. Analyzed the data: LMP JAS LCS ACM. Wrote the paper: LMP JEH PAP LCS LFB JAS.