a quantitative study of the immunofluorescent endocrine cell types ( insulin , glucagon , somatostatin and pancreatic polypeptide cells ) in pp-rich and pp-poor regions of pancreases in 8 subjects with ages ranging from 33 fetal weeks to 80 years , showed that the proportions of the cell types were different in youngs and adults .
C0392762
quantitative
C1514721
ranging