1. School of Clinical Dentistry; University of Sheffield; Sheffield United Kingdom
2. Department of Microbiology; Faculty of Biochemistry, Biophysics and Biotechnology; Jagiellonian University; Krakow Poland
3. Biomolecular Research Centre; Sheffield Hallam University; City Campus; Sheffield United Kingdom
4. Department of Oral Immunology and Infectious Diseases; University of Louisville School of Dentistry; Louisville Kentucky