A–H: Immunofluorescence images of DHE (red fluorescence) and DAPI (nuclei, blue) staining from control and NEC mice. A–D proximal (duodenum) and E–H distal (ileum), 10μm: Cryo-sections (Ctrl, Control-Breast fed or experimental NEC treatments with hypoxia and formula feeding). PDF, pre-digested fat, scale bar =10μm.