1. Department of Dermatology, College of Medicine, Chungnam National University, Daejeon, Korea.
2. Department of Radiation Oncology, College of Medicine, Chungnam National University, Daejeon, Korea.
3. Cancer Research Institute, Chungnam National University, Daejeon, Korea.
4. Department of Biology, College of Natural Sciences, Chungnam National University, Daejeon, Korea.