Bouttell, J., Corcoran, N., Doyle, E., Harding-Edgar, L., Jani, B., O'Donnell, C., Oliver, J., Stein, A., Thompson, L. & White, B. 2022, SIGN 162 Assessment of COVID-19 in Primary Care: The identification of symptoms, clinical signs, characteristics, and comorbidities in adults, children and young people, which may indicate a higher risk of progression to severe disease, Scottish Intercollegiate Guidelines Network (SIGN). Available at: http://eprints.gla.ac.uk/268110/