1. Department of Conservative Dentistry, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 07345, Republic of Korea
2. Department of Dentistry, Eunpyeong St. Mary’s Dental Hospital, College of Medicine, The Catholic University of Korea, Seoul 03312, Republic of Korea
3. Private Dental Clinic, Republic of Korea
4. Department of Conservative Dentistry, Seoul St. Mary’s Dental Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea