GSTP1 and bronchiolitis: Analysis of the three genotypes showed that, infants with the GG genotype of GSTP1 (rs1695) had a significantly increased risk of LRTIs, especially bronchiolitis, during the first year of life (aOR 22.04, 95% CI: 4.79–101.47; aOR 14.61, 95% CI: 3.23–66.11, respectively) (Additional file 1: Figure S1).