title: Letter: Effect of melatonin on the rat pars intermedia. An electron microscopic study.
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects*; D003594:Cytoplasmic Granules / Q000187:drug effects / Q000648:ultrastructure; D008550:Melatonin / Q000494:pharmacology*; D008854:Microscopy, Electron; D008928:Mitochondria / Q000187:drug effects / Q000648:ultrastructure; D051381:Rats; D013572:Synaptic Vesicles / Q000187:drug effects / Q000648:ultrastructure; D013997:Time Factors
chemical_list: D008550:Melatonin