1. National Park Service, Wildlife Health Branch, Biological Resource Management Division, 1201 Oakridge Drive, Suite 200, Fort Collins, Colorado 80525, USA
2. Gettysburg National Military Park, 1195 Baltimore Pike, Gettysburg, Pennsylvania 17325, USA
3. National Park Service, Wildlife Health Branch, Biological Resources Division, 1201 Oakridge Drive, Suite 200, Fort Collins, Colorado 80525, USA