1. Colorado Division of Wildlife, Research Center, 317 West Prospect, Fort Collins, Colorado 80526, USA
2. National Park Service, Biological Resource Management Division, 1201 Oak Ridge Drive, Suite 200, Fort Collins, Colorado 80525, USA
3. Department of Forestry, Range, and Wildlife Science, Utah State University, Logan, Utah 84322, USA
4. SuperGen, Inc., 1059 Serpentine Lane, Pleasanton, California 94566, USA
5. Atrix Laboratories, Inc., 2579 Midpoint Drive, Fort Collins, Colorado 80525, USA
6. Animal Reproduction and Biotechnology Laboratory, Department of Physiology, Colorado State University, Fort Collins, Colorado 80523, USA