title: Interlaboratory comparison of nortriptyline levels.
mesh_terms: D002849:Chromatography, Gas; D006801:Humans; D008722:Methods; D009661:Nortriptyline / Q000097:blood*; D011786:Quality Control; D011865:Radioisotope Dilution Technique
chemical_list: D009661:Nortriptyline