title: Regional analgesia for postoperative pain: then & now.
authors.forename: Spencer S
authors.initials: SS
authors.lastname: Liu
mesh_terms: D000698:Analgesia / Q000266:history* / Q000379:methods; D000765:Anesthesia, Conduction / Q000266:history*; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D010149:Postoperative Pain / Q000266:history* / Q000517:prevention & control*