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Derivation of main and rare HLA-B27 subtypes from founder HLA-B*27 allele B*27:05. AF, African; EA, Eastern Asian; EU, European; FI, Filipino; JA, Japanese; NA, North American; SA, South American; SCA, Scandinavian; SEA, Southeast Asian; TUR, Turkic. Subtypes where ethnicity origin was not designated derived from individuals where ethnicity was not recorded. Source: https://www.ebi.ac.uk/ipd/imgt/hla/allele.html; accessed September 27, 2020
