1. School of Pharmaceutical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, UK2
2. Institute of Infections and Immunity, Queens Medical Centre, University of Nottingham, Nottingham NG7 2UH, UK1
3. SmithKline Beecham Pharmaceuticals, Harlow CM19 5AW, UK3
4. MRC Molecular Pathogenesis Group, Department of Oral Microbiology, St Bartholomews and the Royal London School of Dentistry, 32 Newark St, London E1 2AA, UK4