1. Div. of Immunopharmacology; School of Pharmacy; Sungkyunkwan Univ; Suwon Gyunggi-do 440-746 Republic of Korea
2. Dept. of Molecular Cell Biology; Samsung Biomedical Research Inst; School of Medicine; Sungkyunkwan Univ; Suwon Gyunggi-do 440-746 Republic of Korea
3. College of Natural Sciences; Andong Natl. Univ; Andong Gyeongsang buk-do 760-749 Republic of Korea