1 Tropical and Infectious Diseases Unit, Royal Liverpool and Broadgreen University Hospitals Trust, Liverpool, United Kingdom.
2 North Manchester General Hospital, Pennine Acute NHS Trust, Manchester, United Kingdom.
3 Faculty of Biology, Medicine, and Health, University of Manchester, Manchester, United Kingdom.
4 Tropical and Infectious Diseases Unit, Royal Liverpool and Broadgreen University Hospitals Trust, Liverpool, United Kingdom T.E.Wingfield@liverpool.ac.uk.
5 Institute of Infection and Global Health, University of Liverpool, Liverpool, United Kingdom.