1. Department of Oriental Pharmacy, College of Pharmacy, Wonkwang University, Iksan, Jeonbuk 570-749, Republic of Korea
2. Department of Immunology, Chonbuk National University Medical School, Jeonju, Jeonbuk 561-182, Republic of Korea
3. Institute of Digestive Disease, Wonkwang University, Iksan, Jeonbuk 570-749, Republic of Korea
4. College of Pharmacy, Chungnam National University, Daejeon 305-764, Republic of Korea