Figure 1From: TNFA-863 polymorphism is associated with a reduced risk of Chronic Obstructive Pulmonary Disease: A replication study Pairwise linkage disequilibrium between SNPs in the LTA and TNFA genes. Values provided in each box, were estimated as r2 using Haploview 3.2. Dark grey regions depict strong LD (1.0), pale grey and white regions represent low LD.Back to article page