1. Boyce Thompson Institute, Ithaca, NY 14853, USA, and Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, AZ 85721, USA
2. Division of Biology, Kansas State University, Manhattan, Kansas, 66506, USA
3. Department of Biological Sciences, University of Cincinnati, Cincinnati, Ohio, 45221, USA
4. Biology Department, Indian River State College, Fort Pierce, Florida, 34981, USA