MMP9 and laryngotracheoesophageal cleft: Furthermore, MMP-9 rs3918242 was observably connected to LC incidence in the recessive and allelic models in Caucasians (recessive model, OR = 0.257, 95% CI = 0.118–0.561, p = 0.001; allelic model, OR = 0.798, 95% CI = 0.661–0.962, p = 0.018).