title: APUD: dogma defended.
mesh_terms: D001078:APUD Cells / Q000378:metabolism / Q000502:physiology*; D001079:Apudoma / Q000503:physiopathology; D018288:Carcinoma, Small Cell / Q000378:metabolism; D006801:Humans; D008175:Lung Neoplasms / Q000378:metabolism