1. Department of Microbial Diseases, UCL Eastman Dental Institute, 256 Gray's Inn Road, London WC1X 8LD, UK
2. Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), Gustav Mahlerlaan 3004, 1081 LA Amsterdam, The Netherlands
3. Department of Cariology, Institute of Odontology at Sahlgrenska Academy, University of Gothenburg, 40530 Götegborg, Sweden
4. DIPTERIS, University of Genoa, Corso Europa 26, 16132 Genoa, Italy
5. Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
6. Dipartimento di Patologia-Sezione di Microbiologia, Università di Verona, 37134 Verona, Italy