1. United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, Fort Collins, CO, USA
2. Monell Chemical Senses Center, 3500 Market Street, Philadelphia, PA 19104, USA
3. Starker Forests, Inc., 7240 SW Philomath Boulevard, Corvallis, OR 97339, USA
4. United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
5. British Columbia Ministry of Forests and Range, Research, Innovation and Knowledge Management Branch, Cowichan Lake Research Station, P.O. Box 335, 7060 Forestry Road, Mesachie Lake, BC, Canada V0R 2N0