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Manhattan plots for genomewide association analysis of red blood cell (RBC) traits. The vertical axis indicates (–log10 transformed) observed P values, and the horizontal line indicates the genomewide significance level of P<5E-08. HCT = hematocrit; HGB = hemoglobin; MCH = mean corpuscular hemoglobin; MCHC = mean corpuscular hemoglobin concentration; MCV = mean corpuscular volume.
