title: A study of gastric aspirate in normal and preterm infants on first day of life.
mesh_terms: D005750:Gastric Juice / Q000032:analysis* / Q000201:enzymology; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007231:Infant, Newborn; D007234:Infant, Premature; D010434:Pepsin A / Q000032:analysis
chemical_list: D010434:Pepsin A