https://epi-perspectives.biomedcentral.com/articles/10.1186/1742-5573-4-13 https://epi-perspectives.biomedcentral.com/articles/10.1186/1742-5573-4-10 https://epi-perspectives.biomedcentral.com/articles/10.1186/1742-5573-4-12 https://epi-perspectives.biomedcentral.com/articles/10.1186/1742-5573-4-11