https://pophealthmetrics.biomedcentral.com/articles/10.1186/s12963-021-00260-5
https://pophealthmetrics.biomedcentral.com/articles/10.1186/s12963-021-00256-1
https://pophealthmetrics.biomedcentral.com/articles/10.1186/s12963-021-00251-6
https://pophealthmetrics.biomedcentral.com/articles/10.1186/s12963-021-00259-y
https://pophealthmetrics.biomedcentral.com/articles/10.1186/s12963-021-00255-2