Intestinal GATA binding protein 4 (GATA-4) expression. A: relative tissue expression of GATA-4 in jejunum and ileum of term and preterm pigs to localize the tissue of primary expression [n (Preterm) = 33; n (Term) = 23; P (Tissue × GA) <0.05]. B and C: relative expression of GATA-4 in jejunum and ileal tissue of term (T) and preterm (P) pigs at birth and on day 3 (Preterm-Birth, n = 16, Preterm-Day 3, n = 17, Term-Birth, n = 10, Term-Day 3, n = 13). All graphs are means ± SE. *P (GA × Day) < 0.05, **P (GA × Day) < 0.01, ***P (GA × Day) < 0.001, ****P (GA × Day) < 0.0001.