ancestry category Greater Middle Eastern (Middle Eastern or North African or Persian) ancestry Includes individuals who self-report or were described by authors as Middle Eastern, North African, Persian or one of the subpopulations from this region (e.g. Saudi Arabian). We note there is heterogeneity in this category with different degrees of admixture as well as levels of genetic isolation. We note that there does not appear to be a suitable reference population for this category and efforts are required to fill this gap.