Abbott, T., Ahmad, T., Phull, M., Fowler, A., Hewson, R., Biccard, B., … Study, group. I. S. O. (2018). The surgical safety checklist and patient outcomes after surgery: a prospective observational cohort study, systematic review and meta-analysis. British Journal of Anaesthesia, 120(1), 146-155. https://doi.org/10.1016/j.bja.2017.08.002

Kahan, B., Koulenti, D., Arvaniti, K., , Campbell, D., Chan, M., … Study, group. I. S. O. (2017). Critical care admission following elective surgery was not associated with survival benefit: prospective analysis of data from 27 countries. Intensive Care Medicine, 43(7), 971-979. https://doi.org/10.1007/s00134-016-4633-8