1. Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science, Rural Development Administration, Eumseong 369-873, Korea.
2. Department of Rheumatology, School of Medicine, Kyung Hee University, Seoul 130-701, Korea.
3. Department of Clinical Pharmacology, School of Medicine, Kyung Hee University, Seoul 130-701, Korea.