%0 Journal Article %K Health Informatics %K Epidemiology %B BMC Medical Research Methodology %D 2020 %G eng %I Springer Science and Business Media LLC %N 1 %R 10.1186/s12874-020-01132-6 %T When complexity matters: a step-by-step guide to incorporating a complexity perspective in guideline development for public health and health system interventions %V 20