1. Laboratory of Dermato-Immunology, Catholic Research Institute of Medical Science, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
2. Biological Sciences Center, University of Minnesota Twin Cities, St. Paul, Minnesota.
3. Department of Bioengineering, College of Engineering, Hanyang University, Seoul, Republic of Korea.
4. Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea.