Objective To investigate the difference between hydrolyzed protein milk and formula milk fed to preterm low-birth-weight neonatal in the protection of stomach and intestine,so that better diary product can be chosen for hospitalized low-birth-weight baby.Methods We retrospectively analyzed the basic information of 156 low-birthweight babies treated in our hospital from February 2008 to August 2010.Data like gender of the baby,gestational age,birth weight,age of first milk feeding,days of continuous feeding,...