Morphine analgesia and gastrointestinal morbidity in preterm infants: secondary results from the NEOPAIN trial.
Menon G, Boyle EM, Bergqvist LL, McIntosh N, Barton BA, Anand KJ. Morphine analgesia and gastrointestinal morbidity in preterm infants: secondary results from the NEOPAIN trial. Arch Dis Child Fetal Neonatal Ed. 2008 Sep; 93(5):F362-7.