Holt, H., Talaei, M., Greenig, M., Zenner, D., Symons, J., Relton, C., Young, K., Davies, M., Thompson, K., Ashman, J., Rajpoot, S., Kayyale, A., El Rifai, S., Lloyd, P., Jolliffe, D., Timmis, O., Finer, S., Iliodromiti, S., Miners, A., Hopkinson, N., Alam, B., Lloyd-Jones, G., Dietrich, T., Chapple, I., Pfeffer, P., McCoy, D., Davies, G., Lyons, R., Griffiths, C., Kee, F., Sheikh, A., Breen, G., Shaheen, S. & Martineau, A. 2021, 'Risk factors for developing COVID-19: a population-based longitudinal study (COVIDENCE UK)', Thorax. https://doi.org/10.1136/thoraxjnl-2021-217487