1. Department of Restorative, Pediatric and Preventive Dentistry, University of Bern, 3012 Bern, Switzerland
2. Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy
3. Department of Medicine, Surgery and Pharmacy, University of Sassari, 07100 Sassari, Italy
4. Center for Public Health Research, University of Milan–Bicocca, 20126 Monza, Italy
5. IRCCS Istituto Auxologico Italiano, 20145 Milan, Italy
6. Department of Cariology, Saveetha Dental College and Hospitals, Chennai 600077, India