1. Department of Periodontology, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea.
2. Department of Family Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
3. Department of Oral and Maxillofacial Surgery, Research Institute for Intractable Osteonecrosis of the Jaw, College of Medicine, Ewha Womans University, Seoul, Korea.
4. Department of Conservative Dentistry, Yeouido ST. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.