1. The Children's Museum of Indianapolis, Indianapolis, IN 42608 E-mail: JAnne@childrensmuseum.org
2. Temple University, Department of Earth and Environmental Science, Philadelphia, PA, 19122 E-mail: altd@temple.edu
3. Arcadia University, Biology Department, Glenside, PA 19038 E-mail: hcuff@arcadia.edu
4. University of Pennsylvania, School of Veterinary Medicine, Philadelphia, PA 19104 HOPE Veterinary Specialists, Malvern, PA 19355 E-mail: pgo@vet.upenn.edu
5. University of Pennsylvania, School of Veterinary Medicine, Philadelphia, PA 19104 E-mail: grandsta@vet.upenn.edu