1. Dept of Integrative Biology, Univ. of Texas at Austin Austin TX 78712 USA
2. Ecology and Evolutionary Biology, and Inst. for System Genomics, Univ. of Connecticut Storrs CT USA
3. Center for the Ecology of Infectious Disease, Univ. of Georgia Athens GA 30602 USA
4. Ecology and Evolutionary Biology, Univ. of California Santa Cruz Santa Cruz CA USA
5. Dept of Biology, Loyola Univ. Chicago IL USA
6. Office of Institutional Research, Western Michigan Univ. Kalamazoo MI USA