Fig. 2From: A genome-wide association study identifies risk loci for spirometric measures among smokers of European and African ancestryComparison of chromosome 4 region [near HHIP] between NHW (a) and AA (b) for FEV1/FVC. Note that unlike for chromosome 15, there is not a similar signal in AA, although this could be due to the reduced statistical power in the smaller sample size of AABack to article page