title: Dueling Guidelines.
authors.affiliation: Department of Anesthesiology Boston Medical Center Boston, MA.
authors.forename: Mark C
authors.initials: MC
authors.lastname: Norris
mesh_terms: D000765:Anesthesia, Conduction / Q000379:methods*; D000925:Anticoagulants / Q000008:administration & dosage*; D006801:Humans; D009407:Nerve Block / Q000379:methods*; D010146:Pain / Q000188:drug therapy*; D059408:Pain Management / Q000379:methods*; D010975:Platelet Aggregation Inhibitors / Q000008:administration & dosage*
chemical_list: D000925:Anticoagulants; D010975:Platelet Aggregation Inhibitors