Affiliation: | 1. Unit of Periodontology, Department of Oral Health Sciences, University Hospital Leuven & University of Leuven, Leuven, Belgium;2. Scientific Institute of Public Health, Brussels, Belgium;3. UNI‐DENT & Elysee Dental, Leuven, Belgium;4. Research group Periodontology & Oral microbiology, Department of Oral Health Sciences, University of Leuven, Leuven, Belgium |