Cavalli, L., Angehrn, L., Schindler, C., Orsini, N., Grob, C., Kaufmann, M., Steiner, L.A., Schwenkglenks, M. and Dell-Kuster, S. 2022. Number of comorbidities and their impact on perioperative outcome and costs – a single centre cohort study. Swiss Medical Weekly. 152, 1112 (Mar. 2022), w30135. DOI:https://doi.org/10.4414/SMW.2022.w30135.