LANCET RESPIRATORY MEDICINE The Lancet. Respiratory Medicine ISARIC4C Investigators 2021, ' Risk of adverse outcomes in patients with underlying respiratory conditions admitted to hospital with COVID-19: a national, multicentre prospective cohort study using the ISARIC WHO Clinical Characterisation Protocol UK ', The Lancet. Respiratory medicine, vol. 9, no. 7, pp. 699-711 . https://doi.org/10.1016/S2213-2600(21)00013-8 2021, ' Risk of adverse outcomes in patients with underlying respiratory conditions admitted to hospital with COVID-19 : a national, multicentre prospective cohort study using the ISARIC WHO Clinical Characterisation Protocol UK ', The Lancet Respiratory Medicine, vol. 9, no. 7, pp. 699-711 . https://doi.org/10.1016/S2213-2600(21)00013-8