title: Ultrastructural and X-ray microprobe comparison of gerbil and human pineal acervuli.
mesh_terms: D000818:Animals; D005849:Gerbillinae; D006801:Humans; D008854:Microscopy, Electron; D010870:Pineal Gland / Q000648:ultrastructure*; D013045:Species Specificity; D013057:Spectrum Analysis; D014965:X-Rays