1. WildCare Institute, Saint Louis Zoo, One Government Drive, Saint Louis, Missouri 63110, USA
2. University of Missouri–Saint Louis, 8001 Natural Bridge Road, Saint Louis, Missouri 63121, USA
3. Charles Darwin Foundation, Puerto Ayora, Santa Cruz, Galapagos, Ecuador
4. Veterinary Diagnostic Laboratory, Colorado State University, 300 West Drake, Fort Collins, Colorado 80523-1644, USA
5. The Peregrine Fund, 5668 West Flying Hawk Lane, Boise, Idaho 83709, USA
6. Laboratorio de Epidemiología, Patología, y Genética–Proyecto Iniciativa Darwin, Galapagos National Park, Ecuador