1. Laboratory of Development and DifferentiationKorea Research Institute of Bioscience and BiotechnologyYusongDaejon305‐333
2. AgroPharma Research InstituteDongbu Hannong Chemical Co. Ltd.Daeduck Science TownDaejon305‐708
3. Laboratory of Experimental Animal ResourcesKorea Research Institute of Bioscience and BiotechnologyYusongDaejon305‐333
4. Center for Biological Modulators of the 21st Century Frontier ProgramKorea Research Institute of Chemical TechnologyYusongDaejon305‐343Korea