1. Department of Pathobiology, Ontario Veterinary College University of Guelph Guelph Ontario Canada
2. W.M. Keck Science Department, Claremont McKenna, Pitzer, and Scripps Colleges Claremont California USA
3. Department of Biomedical Sciences and Department of Integrative Biology Oregon State University Corvallis Oregon USA
4. Department of Ecology and Evolutionary Biology Yale University New Haven Connecticut USA