1. Department of Life Sciences, Datong University, Datong, China.
2. Department of Food and Nutrition, Wonkwang University, Iksan, Korea.
3. Department of Oral Biochemistry, Wonkwang University, Iksan, Korea.
4. College of Education, Wonkwang University, Iksan, Korea.
5. Department of Oral Microbiology, Wonkwang University, Iksan, Korea.