1. BK21 FOUR Education Research Group for Age-Associated Disorder Control Technology, Department of Integrative Biological Science, Chosun University, Gwangju 61452, Korea
2. Department of Biology, College of Natural Science, Chosun University, Gwangju 61452, Korea
3. Department of Obstetrics and Gynecology, Chosun University School of Medicine, Gwangju 61452, Korea
4. Department of Veterinary Anatomy, College of Veterinary Medicine and BK21 FOUR Program, Chonnam National University, Gwangju 61186, Korea
5. Department of Otolaryngology, Chonnam National University Medical School, Gwangju 61469, Korea