1. United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center. 4101 Laporte Avenue, Fort Collins, Colorado 80521, USA
2. United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Feral Swine Damage Management Program. 4101 Laporte Avenue, Fort Collins, Colorado 80521, USA
3. United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services. 4101 Laporte Avenue, Fort Collins, Colorado 80521, USA
4. United States Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services. 2150 Centre Avenue, Building B, Fort Collins, Colorado 80526, USA