Fig. 3From: β2-Adrenergic receptor promoter haplotype influences the severity of acute viral respiratory tract infection during infancy: a prospective cohort studyLinkage disequilibrium (LD) plot in Caucasian (a) and African Americans (b). The plot illustrates the linkage disequilibrium mapping using the HaploView program in Caucasian (a) and African Americans (b) at 5 loci of the B2-adrenergic receptor gene: -2633, -2274, -1343 (in the promoter region), and +46 and +79 (in the coding block)Back to article page