Clausen, L Intravenous ketamine for postoperative analgesia. [electronic resource] - South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde Aug 1975 - 1437-40 p. digital Publication Type: Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article ISSN: 0256-9574 Subjects--Topical Terms: Clinical Trials as TopicHumansInfusions, ParenteralKetamine--administration & dosageMorphine--administration & dosagePain, Postoperative--prevention & controlPlacebosRespiration--drug effects