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New HLA data for the Tirio, Parakanã, Kayapo and Mapuche tribes, as well as supplementary data for the Waiãpi, are presented. Taken together with previously published information on South American Indians, these typings show a remarkably homogeneous gene pool with a restricted range of polymorphisms and a further restricted set of haplotypes.
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Black et al. (1980) studied this question.
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