About the Authors
Department of Biological Statistics and Computational Biology, Cornell University, Ithaca, New York, United States of America
Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America
Center for Bioinformatics and Department of Biology, University of Copenhagen, Copenhagen, Denmark
The authors have declared that no competing interests exist.
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.