About the Authors

Jada Benn Torres

Contributed equally to this work with: Jada Benn Torres, Menahem B. Doura

Affiliation Department of Anthropology, University of Notre Dame, Notre Dame, Indiana, United States of America

Menahem B. Doura

Contributed equally to this work with: Jada Benn Torres, Menahem B. Doura

Affiliation Department of Pharmacology and Physiology, George Washington University, Washington, District of Columbia, United States of America

Shomarka O. Y. Keita

Affiliation National Human Genome Center, Howard University, Washington, District of Columbia, United States of America

Rick A. Kittles

rkittles@uic.edu

Affiliations Department of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States of America, Division of Epidemiology and Biostatistics, University of Illinois at Chicago, Chicago, Illinois, United States of America, Institute of Human Genetics, University of Illinois at Chicago, Chicago, Illinois, United States of America

Competing Interests

The authors have read the journal's policy and have the following conflict: RK has part ownership (49%) of a company called African Ancestry, which is a DNA testing company for determining African Ancestry of mtDNA and Y chromosomes. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials. All other authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MBD RAK. Performed the experiments: MBD. Analyzed the data: JBT MBD SOYK RAK. Contributed reagents/materials/analysis tools: RAK. Wrote the paper: JBT MBD SOYK RAK.