A close neuroanatomical relationship between the enkephalinergic (methionine-enkephalin) and tachykininergic (substance P) systems in the alpaca diencephalon - Sanchez, Pablo; Lisardo Sanchez, Manuel; Mangas, Arturo; Angel Aguilar, Luis; Covenas, Rafael (FOLIA HISTOCHEMICA ET CYTOBIOLOGICA, 2020)