1. Green Cross Corp., Yongin 446-799, Korea.
2. Neurotech Pharmaceuticals, Seongnam 462-807, Korea.
3. Therapeutic Antibody Research Center, Korea Research Institute of Bioscience and Biotechnology Daejeon 305-333, Korea.
4. The Department of Bioscience and Biotechnology, Sejong University, Seoul 143-747, Korea.