ACP: acute cor pulmonale; BMI: body mass index; COVID-19: coronavirus disease 2019; DM: diabetes mellitus; HBV: hepatitis B virus infection; HC: hypercholesterolaemia; HTN: hypertension; HT: hypothyroidism; I: intensivist/anaesthetist consultant; ICH: intracranial haemorrhage; IGT: impaired glucose tolerance; MOF: multiple organ failure; NA: not applicable (patient was not retrieved); PCOS: polycystic ovarian syndrome; PE: pulmonary embolism; PF: pulmonary fibrosis; Pnx: pneumothorax; RPH: Royal Papworth Hospital; S: surgical consultant; Sa: sarcoidosis; SCT: sickle cell trait; SLE: systemic lupus erythematosus; STE: systemic thromboembolism.