1. Department of Genitourinary Medicine, Bristol Royal Infirmary, Bristol BS2 8AS, UK
2. Genitourinary Infections Reference Laboratory, Bristol, UK
3. Department of Genitourinary Medicine, Royal Cornwall Hospital, Truro, UK
4. Department of Genitourinary Medicine, Royal United Hospital, Bath, UK
5. Department of Genitourinary Medicine, Bristol Royal Infirmary, Bristol BS2 8AS, UK; Clinical Sciences South Bristol, University of Bristol, Bristol BS2 8AS, UK