1. Haub School of Environment and Natural Resources, University of Wyoming Laramie Wyoming USA
2. U.S. Forest Service, Rocky Mountain Research Station Missoula Montana USA
3. U.S. Forest Service, Rocky Mountain Research Station Albuquerque New Mexico USA
4. U.S. Forest Service, Rocky Mountain Research Station Flagstaff Arizona USA
5. Center for Population Health Research, School of Public and Community Health Sciences University of Montana Missoula Montana USA