1. Department of Biochemistry, College of Medicine, Chung-Ang University, 221 Heukseok-Dong Dongjak-Gu, Seoul 156-756, Republic of Korea
2. National Cosmeceutical Research Center, Korea Research Institute of Bioscience and Biotechnology, 52 Oeun-Dong, Yuseong-Gu, Daejeon 305-333, Korea
3. Department of Dermatology, Seoul National University College of Medicine, 28 Yongon-Dong, Chongno-Gu, Seoul 110-744, Republic of Korea
4. Welskin Co. Ltd, 28 Yongon-Dong, Chongno-Gu, Seoul 110-744, Korea