?:authorAffiliation
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[\'Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, CH-3010 Bern, Switzerland.\', \'Department of Periodontology and Operative Dentistry, University Medical Center of the Johannes Gutenberg-University Mainz, D-55131 Mainz, Germany.\', \'Free Association of German Dentists/Freier Verband Deutscher Zahnärzte (FVDZ), D-53117 Bonn, Germany.\', \'Department of Biomedical, Surgical and Dental Science, University of Milan, I-20142 Milan, Italy.\', \'Department of Surgery, Microsurgery and Medicine Sciences, School of Dentistry, University of Sassari, I-07100 Sassari, Italy.\', \'WHO Collaborating Centre for Epidemiology and Community Dentistry, University of Milan, I-20142 Milan, Italy.\']
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