1. Preemptive Analgesia: No Relevant Advantage of Preoperative Compared With Postoperative Intravenous Administration of Morphine, Ketamine, and Clonidine In Patients Undergoing Transperitoneal Tumor Nephrectomy. Issue 3 (1st May 2002) Authors: Holthusen, Holger; Backhaus, Peter; Boeminghaus, Frank; Breulmann, Maria; Lipfert, Peter Journal: Regional anesthesia and pain medicine Issue: Volume 27:Issue 3(2002) Page Start: 249 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗