1. Research Department; Saint Louis Zoo; St. Louis, Missouri
2. AZA Wildlife Contraception Center; Saint Louis Zoo; St. Louis, Missouri
3. The Royal Veterinary College; University of London; London United Kingdom
4. Facultad de Ciencias Veterinarias y Pecuarias; Universidad de Chile; Santiago Chile
5. Biology Department; Saint Louis University; St. Louis Missouri
6. Anneke Moresco, Denver Zoo; Denver, Colorado