Quantification of argyrophillic, argentaffin and insulin immunoreactive cells in the small intestine in the opossum Didelphis aurita (Wied-Neuwied, 1826) - doi: 10.4025/actascibiolsci.v33i4.8644. Acta Sci. Biol. Sci. 2011;33(4):479-485. doi:10.4025/actascibiolsci.v33i4.8644