Reduced neutrophil count in people of African descent is due to a regulatory variant in the Duffy antigen receptor for chemokines gene - PubMed

Genome-wide association study of white blood cell count in 16,388 African Americans: the continental origins and genetic epidemiology network (COGENT).

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Gene encoding Duffy antigen/receptor for chemokines is associated with asthma and IgE in three populations.

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