ARDS(1) anaesthesia(1) high pain responders(1) frailty(1) Imported infections(1) postoperative pain(1) Inflammation(1) trajectory cluster(1) ICU(1) Total knee arthroplasty(1) high-dose steroids(1) Ethnicity(1) Dexamethasone(1) fast-track surgery(1) Critical illness(1) malaria(1) multimodal analgesia(1) COVID-19(1) survival(1)