AHR and necrotizing enterocolitis: As shown in Fig. 2, the expression of AHR was significantly reduced in the small intestine of infants with NEC as compared with control infants (Fig. 2a–c), in the intestinal mucosa of mice that were induced to develop NEC (Fig. 2d–f), and in an experimental model of NEC in premature piglets (Fig. 2g–i), compared to control subjects.