McKeigue, P., Kennedy, S., Weir, A., Bishop, J., McGurnaghan, S., McAllister, D., Robertson, C., Wood, R., Lone, N., Murray, J., Caparrotta, T., Smith-Palmer, A., Goldberg, D., McMenamin, J., Guthrie, B., Hutchinson, S. & Colhoun, H. 2021, 'Relation of severe COVID-19 to polypharmacy and prescribing of psychotropic drugs: the REACT-SCOT case-control study', BMC Medicine, 19, article no: 51. https://doi.org/10.1186/s12916-021-01907-8