Affiliation: | 1Regional Infectious Disease Unit, Fazakerley Hospital, Liverpool L9 7AL, U.K.;2Liverpool Public Health Laboratory, Fazakerley Hospital, Liverpool L9 7AL, U.K.;3Liverpool School of Tropical Medicine, Liverpool L3 5QA, U.K.;4The Maryland Centre, 8 Maryland Street, Liverpool L1 9DE, U.K.;5Communicable Disease Surveillance Centre (North West), Public Health Laboratory, Liverpool L9 7AL, U.K.;6Fazakerley Hospital, Liverpool L9 7AL, U.K. |