Comparison of Morphine With and Without Fentanyl for Epidural Analgesia After Major Abdominal Surgery
Sigrun Chrubasik, Joachim Chrubasik, Markus Pfisterer, Rolf Hage, Jürgen Schulte-Mönting
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control May 1996, 21 (3) 175-181; DOI: 10.1136/rapm-00115550-199621030-00001