Pain Relief After Knee Arthroscopy: Intra-articular Morphine, Intra-articular Bupivacaine, or Subcutaneous Morphine?: Intra-articular Morphine, Intra-articular Bupivacaine, or Subcutaneous Morphine? - Soledad M. Cepeda; Carlos Uribe; Jairo Betancourt; Jose Rugeles; Daniel B. Carr (Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control, 1997)