1. Simons Center for Quantitative Biology, Cold Spring Harbor Laboratory , Cold Spring Harbor, New York , USA
2. Cold Spring Harbor Laboratory , Cold Spring Harbor, New York , USA
3. American Museum of Natural History, Institute for Comparative Genomics , New York, New York , USA
4. School of Biological Sciences, University of Oklahoma , Norman, Oklahoma , USA
5. Departments of Computer Science and Biology, Johns Hopkins University , Baltimore, Maryland , USA
6. Department of Mammalogy, Division of Vertebrate Zoology, American Museum of Natural History , New York, New York , USA