[The enterochromaffin cellular system in the premature infant; the newborn infant at term and in the older child].
D006801:Humans; D007231:Infant, Newborn / Q000502:physiology; D007234:Infant, Premature / Q000502:physiology*; D007422:Intestines / Q000033:anatomy & histology*
INFANT, NEWBORN/physiology; INFANT, PREMATURE/physiology; INTESTINES/anatomy and histology