highly significantp = 6.0 × 10 −8
Despite the small sample size, the burden of association between BMPR2 and PAH was highly significant ( p = 6.0 × 10 −8 ) compared to the genome-wide significance threshold ( p < 2.4 × 10 −6 ) after Bonferroni correction for approximately 21,000 genes (Fig. 2 ).