Knight, G., Pham, T., Stimson, J., Funk, S., Jafari, Y., Pople, D., Evans, S., Yin, M., Brown, C., Bhattacharya, A., Hope, R., Semple, M., ISARIC4C Investigators, CMMID COVID-19 Working Group, Read, J., Cooper, B. & Robotham, J. 2022, 'The contribution of hospital-acquired infections to the COVID-19 epidemic in England in the first half of 2020', BMC Infectious Diseases, 22(1), article no: 556. https://doi.org/10.1186/s12879-022-07490-4