1. Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, 3012 Bern, Switzerland
2. Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20142 Milan, Italy
3. Department of Medicine and Surgery, School of Dentistry, University of Insubria, 21100 Varese, Italy
4. Department of Periodontology, School of Dental Medicine, University of Bern, 3012 Bern, Switzerland
5. Department of Cariology, Saveetha Dental College and Hospitals, SIMATS, Poonamallee High Road, Chennai 600077, India