1. Departments of Oral Health, College of Health Science, Dankook University, Cheonan, Korea
2. Department of Preventive Dentistry, College of Dentistry, Dankook University, Cheonan, Korea
3. HBD Division, Amorepacific R&D Center, Yongin, Korea
4. Department of Dental Hygiene, Gangneung Yeongdong University, Gangneung, Korea