1. Iwate Biotechnology Research Center, 22-174-4 Narita, Kitakami-shi, Iwate 024-0003, Japan
2. TSUMURA and Company, 3586 Yoshiwara, Ami-machi Inashiki-gun, Ibaraki 300-1192, Japan
3. Edible Mushrooms Institute, Hokken Company, Ltd., 7-3 Ekihigashi, Mibu-machi, Tochigi 321-0222, Japan
4. Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
5. Faculty of Agriculture, Utsunomiya University, 350 Mine-machi, Utsunomiya, Tochigi 321-8505, Japan