1. Department of Epidemiology, Brown School of Public Health, Providence, RI 02903
2. Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544
3. Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08540
4. Miller Institute for Basic Research in Science, University of California, Berkeley, CA 94720
5. Department of Integrative Biology, University of California, Berkeley, CA 94720
6. Wellcome Trust, London, UK
7. School of Public and International Affairs, Princeton University, Princeton, NJ 08540