Affiliation: | 1. Department of Preventive Dentistry, Periodontology and Implant Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece;2. Colgate‐Palmolive, Athens, Greece;3. LRM Statistical Consulting, Hoboken, NJ, USA;4. Colgate‐Palmolive Co., Pistaway, NJ, USA |