Affiliation: | 1. Private Periodontal Practice, Auckland, New Zealand;2. Clinic of Preventive Dentistry, Periodontology and Cariology, University of Zürich, Zürich, Switzerland;3. Institute for Chemical and Bioengineering, ETH Zurich, Zurich, Switzerland;4. Department of Oral Sciences, University of Otago, Dunedin, New Zealand |