Mutch, C P, Ross, D A, Bularga, A, Nicola Rose Cave, R, Chase-Topping, M E, Anand, A, Mills, N L, Koch, O & Mackintosh, C L & Perry, M R 2022, ' Performance status: A key factor in predicting mortality in the first wave of COVID-19 in South-East Scotland ', Journal of the Royal College of Physicians of Edinburgh . https://doi.org/10.1177/14782715221120137