Cogan, N., Megan, M., Gardiner, A. & Morton, L. 2021, 'Understanding risk and protective factors to UK railway workers' mental wellbeing during the COVID-19 pandemic: a cross-sectional survey', The Lancet Public Health, November 2021, 398(Supplement 2), pp. S33-. https://doi.org/10.1016/S0140-6736(21)02576-9