E. A. . Buanes, Øyvind . Bruserud, S. C. . Huroz, A. . Barratt-Due, H. Flaatten, and R. . Kvåle, “ External validation of SAPS II score reported to the Norwegian Intensive Care and Pandemic Registry (NIPaR)”, Nor J Epidemiol, vol. 31, no. 1-2, Oct. 2023.