title: Questions of methodology with labelled microspheres.
mesh_terms: D000818:Animals; D002560:Cerebrovascular Circulation / Q000187:drug effects; D003911:Dextrans / Q000494:pharmacology; D004285:Dogs; D006323:Heart Arrest / Q000503:physiopathology; D008722:Methods; D008863:Microspheres
chemical_list: D003911:Dextrans