1. Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry Yonsei University Seoul Republic of Korea
2. Innovation Research and Support Center for Dental Science Yonsei University Dental Hospital Seoul Republic of Korea
3. Department of Oral Biology Medical University of Vienna Vienna Austria
4. Department of Oral Medicine, Infection and Immunity Harvard School of Dental Medicine Boston Massachusetts USA
5. Department of Conservative Dentistry, Faculty of Dentistry University of Chile Santiago Chile
6. Clinic of Reconstructive Dentistry University of Zurich Zürich Switzerland