https://human-resources-health.biomedcentral.com/articles/10.1186/s12960-021-00589-w https://human-resources-health.biomedcentral.com/articles/10.1186/s12960-021-00591-2 https://human-resources-health.biomedcentral.com/articles/10.1186/s12960-021-00594-z https://human-resources-health.biomedcentral.com/articles/10.1186/s12960-021-00601-3 https://human-resources-health.biomedcentral.com/articles/10.1186/s12960-021-00599-8 https://human-resources-health.biomedcentral.com/articles/10.1186/s12960-021-00592-1 https://human-resources-health.biomedcentral.com/articles/10.1186/s12960-021-00593-0 https://human-resources-health.biomedcentral.com/articles/10.1186/s12960-021-00586-z https://human-resources-health.biomedcentral.com/articles/10.1186/s12960-021-00584-1 https://human-resources-health.biomedcentral.com/articles/10.1186/s12960-021-00598-9 https://human-resources-health.biomedcentral.com/articles/10.1186/s12960-021-00568-1