The 4G/4G genotype of the 4G/5G polymorphism of the type‐1 plasminogen activator inhibitor (PAI‐1) gene is a determinant of penetrating behaviour in patients with Crohn's disease

The 4G/4G genotype of the PAI-1 gene does not influence Crohn's disease susceptibility, but increases by five-fold the probability of penetrating behaviour. ...