1. Department of Biological Anthropology, University of Cambridge, Pembroke Street, Cambridge CB23QY, UK
2. Centro de Investigaciones Tropicales, Universidad Veracruzana, Ex-Hacienda Lucas Martín, priv. Araucarias, Xalapa 91110, Veracruz, Mexico
3. Agriculture and Agri-Food Canada, 5403-1 Avenue South, T1J 4B1 Lethbridge, Alberta, Canada
4. Denver Zoological Foundation, East 2300 Steele St., Denver, Colorado, USA
5. Wildlife Health Services, Rancho La Herradura #13, Col. Santa Cecilia, Mexico City 04930, Mexico