1. Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, Seoul 05029, Korea.
2. Regenerative Dental Medicine Institute, Hysensbio, Gwacheon 13814, Korea.
3. Green Cross Corporation, Yongin 16924, Korea.
4. Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea.