title: Where you are doubtful of doing good, be sure of doing no harm.
authors: J M
authors: JM
authors: Stevens
mesh_terms: D015901:Angiography, Digital Subtraction / Q000009:adverse effects* / Q000379:methods; D002339:Carotid Arteries / Q000000981:diagnostic imaging; D003287:Contrast Media / Q000008:administration & dosage*; D006801:Humans; D007275:Injections, Intravenous; D014711:Vertebral Artery / Q000000981:diagnostic imaging
chemical_list: D003287:Contrast Media