TGFB1 and incontinentia pigmenti: After pooling the data from 14 eligible studies, we shown that patients with TGFB1 IP and/or LP haplotypes were less likely to suffer from AR than those with HP haplotypes (IP vs. HP: OR  = 0.75, 95% CI, 0.58–0.96; IP/LP vs. HP: OR  = 0.77, 95% CI, 0.61–0.98).