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1PD Dr. med. dent., Head of Periodontology, Clinic of Preventive Dentistry, Periodontology and Cariology, Center of Dental Medicine, University of Zurich, Zurich, Switzerland. 2Dr. med. dent., Research Assistant, Clinic of Preventive Dentistry, Periodontology and Cariology, Center of Dental Medicine, University of Zurich, Zurich, Switzerland. 3Prof. Dr. med. dent., Chairman, Clinic of Preventive Dentistry, Periodontology and Cariology, Center of Dental Medicine, University of Zurich, Zurich, Switzerland. 4PhD, MyoPowers Medical Technologies SA, Lausanne, Switzerland before Institute Straumann AG, Basel, Switzerland. 5RDH, BS, EdM, CAS, Research Associate, Clinic of Preventive Dentistry, Periodontology and Cariology, Center of Dental Medicine, University of Zurich, Zurich, Switzerland. 6Prof. em., Former Head of Department, Institute for Oral Biology, Section for Oral Microbiology and General Immunology, Center of Dental Medicine, University of Zurich, Zurich, Switzerland.