although growth of normal and neoplastic urothelial cells in the defined medium was not stimulated by epidermal growth factor , the presence of 50 ng/ml epidermal growth factor induced morphological changes suggestive of terminal maturation of normal urothelium , implying that epidermal growth factor either acted as an epithelial maturation factor or induced the secretion of such a factor .
C0227599
urothelial cells
C0227598
urothelium