1. US Forest Service, Northern Research Station, Center for Forest Mycology Research, One Gifford Pinchot Drive, Madison, Wisconsin 53726
2. Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba, Ibaraki 305-8687, Japan
3. Kansai Research Center, Forestry and Forest Products Research Institute, Kyoto, Kyoto 612-0855, Japan