C. T. Pollmann, F. A. Dahl, J. H. M. Røtterud, J.-E. Gjertsen, and A. Årøen, “Surgical site infection after hip fracture – mortality and risk factors: an observational cohort study of 1,709 patients”, ActaO, vol. 91, no. 3, pp. 347–352, Jan. 2020.