title: The diffuse endocrine system and the implications of the APUD concept.
mesh_terms: D001078:APUD Cells / Q000502:physiology*; D000588:Amines / Q000502:physiology; D006801:Humans; D009490:Neurosecretory Systems / Q000196:embryology / Q000502:physiology*; D010455:Peptides / Q000502:physiology
chemical_list: D000588:Amines; D010455:Peptides