1. Identification Services Unit, National Collection of Type Cultures, PHLS Central Public Health Laboratory, 61 Colindale Avenue, London NW9 5HT
2. Department of Life Sciences, University of East London, Romford Road, London E15
3. Kratos Analytical, Wharfside, Trafford Wharf Road, Manchester M17 1GP
4. Department of Biological Sciences, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, UK