Racial and ethnic diversity is lacking in PsA clinical trials, with non-White participants remaining severely underrepresented.

Information on the racial and ethnic composition of your state and county, and various measures of diversity are available in the following America Counts stories: 2020 U.S. Population More ...

In South America, four distinct Indigenous lineages – Amazonians, Andeans, Chaco Amerindians, and Patagonians – rapidly emerged from a common Mesoamerican origin between 13,900 and 10,000 ...