1. Korean Medicine R&D Center; Dongguk University; Gyeongju 740-814 Korea
2. Department of Herbology, College of Korean Medicine; Dongguk University; Gyeongju 740-814 Korea
3. College of Pharmacy; Chungnam National University; Daejeon 305-764 Korea
4. College of Pharmacy; Chosun University; Gwangju 501-759 Korea