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Schematic representation of UGT1A and the haplotype analyses associated with severe neutropenia based on markers across the UGT1A locus. Variations are represented by squares: a yellow square represents a reference nucleotide, whereas a green square represents a variant (relative to the AF297093 sequence). Only haplotypes with an MAF > 5% in the present study are shown. C, carrier; CI95%, 95% confidence interval; Freq., frequency; NC, noncarrier.
