TNF and cardiomyopathy: As shown in Table IV, out of the four studied SNPs harboured in the TNF-BAT1-LTA cluster, only BAT1 rs3853601 −22 CG genotype and G allele carriers showed an association with protection (ORCG = 0.8, p-value = 0.05 and ORG = 0.5, p-value = 0.03) when analysing cardiomyopathy severity, comparing B1 patients as a control group and C patients as a case group.