Point-of-care tests for infectious diseases: Barriers to implementation across three London teaching hospitals by Bustinduy, A, Jeyaratnam, D, Douthwaite, S, Tonkin-Crine, S, Shaw, R, Hyrapetian, L, Sevdalis, N, Goldenberg, S, Adams, E, Sharland, M, CLAHRC South London Paediatric Infection Network