PMC:5985360 / 34316-34741 JSONTXT

{"project":"2_test","denotations":[{"id":"29526279-22260316-2046676","span":{"begin":281,"end":283},"obj":"22260316"}],"text":"Our study includes sequence data from western, west-central, and eastern Africa but lacks comparable data from northern, central, and southern Africa. A haplotype has been identified among Sudanese individuals that was classified as atypical but might be a fifth African haplotype.54 It is possible that sampling additional populations could provide more evidence regarding when, where, and in whom the sickle mutation arose."}