About the Authors

Scott H Williamson

To whom correspondence should be addressed. E-mail: sw292@cornell.edu

Affiliation Department of Biological Statistics and Computational Biology, Cornell University, Ithaca, New York, United States of America

Melissa J Hubisz

Current address: Department of Human Genetics, University of Chicago, Chicago, Illinoins, United States of America,

Affiliation Department of Biological Statistics and Computational Biology, Cornell University, Ithaca, New York, United States of America

Andrew G Clark

Affiliation Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America

Bret A Payseur

Current address: Laboratory of Genetics, University of Wisconsin, Madison, Wisconsin, United States of America

Affiliation Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America

Carlos D Bustamante

Affiliation Department of Biological Statistics and Computational Biology, Cornell University, Ithaca, New York, United States of America

Rasmus Nielsen

Affiliation Center for Bioinformatics and Department of Biology, University of Copenhagen, Copenhagen, Denmark

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

SHW, MJH, and BP analyzed the data. SHW wrote the first draft of the manuscript. All authors contributed to conceiving the idea and editing the manuscript.