1. Department of Periodontology, Oral Medicine and Oral Surgery Charité – Universitätsmedizin Berlin Berlin Germany
2. Department of Operative and Preventive Dentistry Charité – Universitätsmedizin Berlin Berlin Germany
3. Department of Oral Health Sciences University of Washington Seattle Washington USA
4. Section for Oral Ecology and Caries Control Department of Dentistry and Oral Health Faculty of Health Aarhus University Aarhus Denmark
5. Department of Endodontology Academic Center of Dentistry Amsterdam University of Amsterdam and VU University Amsterdam The Netherlands