Affiliation: | (1) Department of Genetics and Microbiology, Dorman Laboratories, University of Liverpool, L69 3BX Liverpool, UK;(2) Present address: Wolfson Unit of Molecular Genetics, The Liverpool School of Tropical Medicine, Pembroke Place, L3 5QA Liverpool, UK;(3) Present address: Department of Microbiology, Uniformed Services University of the Health Sciences, Jones Bridge Road, 4301 Bethesda, Maryland, USA |