1. Faculty of Odontology, Department of Periodontology University of Malmö Malmö Sweden
2. Division of Oral Surgery University Clinic of Dentistry, Medical University of Vienna Vienna Austria
3. Division of Conservative Dentistry and Periodontology University Clinic of Dentistry, Medical University of Vienna Vienna Austria
4. Division of Phoniatrics‐Logopedics, Department of Otorhinolaryngology Medical University of Vienna Vienna Austria
5. Faculty of Odontology, Department of Oral Biology University of Malmö Malmö Sweden
6. Division of Regenerative Dentistry and Periodontology University Clinics of Dental Medicine (CUMD), University of Geneva Geneva Switzerland