Institution: | aPaediatric Infectious Diseases Unit, St George's University of London, Cranmer Terrace, London SW17 0RE, United Kingdom;bRoyal Victoria Infirmary Hospital, Queen Victoria Road, Newcastle upon Tyne NE1 4LP, United Kingdom;cUniversity College London, Division of Infection and Immunity, Royal Free Hospital, Rowland Hill Street, London NW3 2PF, United Kingdom |