(60.7% European 32.0% African 7.3% Amerindian) Southern Brazil (81.5% European 9.3% African 9.2% Amerindian). According to it the total European, African and Native American contributions to the Brazilian population are: An autosomal study from 2011 (with nearly 1000 samples from all over the country, "whites", "pardos" and "blacks" included, according to their respective proportions) has also concluded that European ancestry is the predominant ancestry in Brazil, accounting for nearly 70% of the ancestry of the population: "In all regions studied, the European ancestry was predominant, with proportions ranging from 60.6% in the Northeast to 77.7% in the South". The 2011 autosomal study samples came from blood donors (the lowest classes constitute the great majority of blood donors in Brazil), and also public health institutions personnel and health students. In all Brazilian regions European, African and Amerindian genetic markers are found in the local populations, even though the proportion of each varies from region to region and from individual to individual. However most regions showed basically the same structure, a greater European contribution to the population, followed by African and Native American contributions: "Some people had the vision Brazil was a heterogeneous mosaic [...] Our study proves Brazil is a lot more integrated than some expected". Brazilian homogeneity is, therefore, greater within regions than between them: A 2015 autosomal genetic study, which also analyzed data of 25 studies of 38 different Brazilian populations concluded that: European ancestry accounts for 62% of the heritage of the population, followed by the African (21%) and the Native American (17%). The European contribution is highest in Southern Brazil (77%), the African highest in Northeast Brazil (27%) and the Native American is the highest in Northern Brazil (32%). According to another study from 2008, by the University of Brasília (UnB), European ancestry dominates in the whole of Brazil (in all regions), accounting for 65,90% of the heritage of the population, followed by the African contribution (24,80%) and the Native American (9,3%). According to an autosomal DNA study (from 2003) focused on the composition of the Brazilian population as a whole, "European contribution [...] is highest in the South (81% to 82%), and lowest in the North (68% to 71%). The African component is lowest in the South (11%), while the highest values are found in the Southeast (18%-20%). Extreme values for the Amerindian fraction were found in the South and Southeast (7%-8%) and North (17%-18%)". The