Pepsin, a marker of gastric contents, is increased in tracheal aspirates from preterm infants who develop bronchopulmonary dysplasia.
Farhath S, He Z, Nakhla T, Saslow J, Soundar S, Camacho J, Stahl G, Shaffer S, Mehta DI, Aghai ZH. Pepsin, a marker of gastric contents, is increased in tracheal aspirates from preterm infants who develop bronchopulmonary dysplasia. Pediatrics. 2008 Feb; 121(2):e253-9.