1. School of Dentistry, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia.
2. Department of Histology, School of Biomedicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia.
3. Institute of Biomedical Sciences, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia.
4. Department of Periodontics and Endodontics, School of Dentistry, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia.
5. Department for Graduate Education Policy and Management, Graduate School, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia.