https://ij-healthgeographics.biomedcentral.com/articles/10.1186/1476-072X-8-4
https://ij-healthgeographics.biomedcentral.com/articles/10.1186/1476-072X-8-3
https://ij-healthgeographics.biomedcentral.com/articles/10.1186/1476-072X-8-7
https://ij-healthgeographics.biomedcentral.com/articles/10.1186/1476-072X-8-2
https://ij-healthgeographics.biomedcentral.com/articles/10.1186/1476-072X-8-6
https://ij-healthgeographics.biomedcentral.com/articles/10.1186/1476-072X-8-1
https://ij-healthgeographics.biomedcentral.com/articles/10.1186/1476-072X-8-5