SLC26A9 and intestinal obstruction in the newborn due to guanylate cyclase 2C deficiency: Recently, polymorphisms in the slc26a9 gene were associated with an increased risk of meconium ileus (MI) in infants with cystic fibrosis (CF) (Sun et al., 2012), which addresses the question regarding the expression and function of Slc26a9 in the intestine.