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APA Citation
Gupta-Wright, A., Macleod, C. K., Barrett, J., Filson, S. A., Corrah, T., Parris, V., Sandhu, G., Harris, M., Tennant, R., Vaid, N., Takata, J., Duraisingham, S., Gandy, N., Chana, H., Whittington, A., McGregor, A., & Papineni, P. (2021). false-negative RT-PCR for COVID-19 and a diagnostic risk score: a retrospective cohort study among patients admitted to hospital. BMJ open, 11(2), . http://access.bl.uk/ark:/81055/vdc_100127577786.0x000059