BMC Medicine, Vol 19, Iss 1, Pp 1-16 (2021) BMC Medicine Carr, E, Bendayan, R, Bean, D, Stammers, M, Wang, W, Zhang, H, Searle, T, Kraljevic, Z, Shek, A, Phan, H TT, London, K, Gupta, R K, Shinton, A J, Wyatt, M, Shi, T, Zhang, X, Pickles, A, Stahl, D, Zakeri, R, Noursadeghi, M, O'Gallagher, K, Rogers, M, Folarin, A, Karwath, A, Wickstrom, K E, Kohn-Luque, A, Slater, L, Cardoso, V R, Bourdeaux, C, Holten, A R, Ball, S, McWilliams, C, Roguski, L, Borca, F, Bachelor, J, Amundsen, E K, Wu, X, Gkoutos, G V, Sun, J, Pinto, A, Guthrie, B, Breen, C, Douiri, A, Wu, H, Curcin, V, Teo, J T, M Shah, A & Dodson, R J B 2021, ' Evaluation and Improvement of the National Early Warning Score (NEWS2) for COVID-19 : a multi-hospital study ', BMC Medicine, vol. 19, no. 23, 23 . https://doi.org/10.1186/s12916-020-01893-3 Carr, E, Bendayan, R, Bean, D, Stammers, M, Wang, W, Zhang, H, Searle, T, Kraljevic, Z, Shek, A, Phan, H T T, Muruet, W, Gupta, R K, Shinton, A J, Wyatt, M, Shi, T, Zhang, X, Pickles, A, Stahl, D, Zakeri, R, Noursadeghi, M, O'Gallagher, K, Rogers, M, Folarin, A, Karwath, A, Wickstrom, K E, Kohn-Luque, A, Slater, L, Cardoso, V R, Bourdeaux, C, Holten, A R, Ball, S, McWilliams, C, Roguski, L, Borca, F, Batchelor, J, Amundsen, E K, Wu, X, Gkoutos, G V, Sun, J, Pinto, A, Guthrie, B, Breen, C, Douiri, A, Wu, H, Curcin, V, Teo, J T, Shah, A M & Dobson, R J B 2021, ' Evaluation and improvement of the National Early Warning Score (NEWS2) for COVID-19 : a multi-hospital study ', BMC Medicine, vol. 19, no. 1, 23, pp. 23 . https://doi.org/10.1186/s12916-020-01893-3