https://pophealthmetrics.biomedcentral.com/articles/10.1186/s12963-021-00258-z
https://pophealthmetrics.biomedcentral.com/articles/10.1186/s12963-021-00261-4
https://pophealthmetrics.biomedcentral.com/articles/10.1186/s12963-021-00257-0
https://pophealthmetrics.biomedcentral.com/articles/10.1186/s12963-021-00252-5
https://pophealthmetrics.biomedcentral.com/articles/10.1186/s12963-021-00262-3