1. Laboratory of Translational Therapeutics, Pharmacology Research Center; Korea Research Institute of Chemical Technology; Daejeon 305-600 Korea
2. Department of Biology; Chungnam National University; Daejeon 305-764 Korea
3. Department of Histology, College of Veterinary Medicine; Kyungpook National University; Daegu 702-701 Korea
4. Laboratory of Phytochemistry Research; Korea Research Institute of Chemical Technology; Daejeon 305-600 Republic of Korea