Genotype and phenotype information from diverse populations is available. Researchers using NIH funding are required to submit any such information they have collected to dbGaP, a public database of genotypes and phenotypes. Analogous recommendations are made by other major biomedical funders outside the United States. In Europe, geneticists are encouraged to share similar data through the European Genome-phenome Archive (EGA). Yet for various reasons (such as the difficulties of getting certain kinds of studies funded, a preference for larger sample sizes, a perception that the analysis will be simplified by using data from one ancestry group or a lack of awareness of the diversity of data sets available) geneticists seem to be preferentially using cohorts of European ancestry.
