FIG. 1.

Distribution of fetal hemoglobin levels conditioned on HBB haplotypes. Boxes have lines at the lower quartile, median, and upper quartile. The plot whiskers extend up and down from the median a distance 1.5 times the interquartile range of the boxes (truncated at zero where necessary). Outliers are the points outside the whiskers indicated as circles. There were not significant differences across various combination of haplotypes (p=0.54) and between them.