1. Department of Biological Sciences Marquette University Milwaukee Wisconsin USA
2. Department of Botany & Plant Pathology Oregon State University Corvallis Oregon USA
3. Smithsonian Tropical Research Institute Balboa Ancon Republic of Panama
4. Pacific Northwest Research Station USDA Forest Service Corvallis Oregon USA
5. Department of Forest Ecosystems & Society Oregon State University Corvallis Oregon USA
6. Department of Forest Engineering, Resources, and Management Oregon State University Corvallis Oregon USA