Comment on

• 'Balanced analgesia' in the perioperative period: is there a place for ketamine?

  De Kock M, Lavand'homme P, Waterloos H. De Kock M, et al. Pain. 2001 Jun;92(3):373-380. doi: 10.1016/S0304-3959(01)00278-0. Pain. 2001. PMID: 11376910 Clinical Trial.
• The effect of cyclooxygenase-2 inhibition on acute and chronic donor-site pain after spinal-fusion surgery.

  Reuben SS, Ekman EF, Raghunathan K, Steinberg RB, Blinder JL, Adesioye J. Reuben SS, et al. Reg Anesth Pain Med. 2006 Jan-Feb;31(1):6-13. doi: 10.1016/j.rapm.2005.10.014. Reg Anesth Pain Med. 2006. Retraction in: Reg Anesth Pain Med. 2009 Mar-Apr;34(2):184. doi: 10.1097/aap.0b013e31819f1617. PMID: 16418018 Retracted. Clinical Trial.