1. Department of Agricultural Environment, Gyeongbuk Agricultural Technology Administration, Daegu 702-320, Korea.
2. Mushroom Research Division, Department of Herbal Crop Research, National Institute of Horicultural & Herbal Science, Rural Development Administration, Suwon 404-707, Korea.
3. College of Veterinary Medicine, Kyungpook National University, Daegu 702-701, Korea.