Joppich R, Richards P, Kelen R, Stern W, Zarghooni K, Otto C, et al. Analgesic Efficacy and Tolerability of Intravenous Morphine Versus Combined Intravenous Morphine and Oxycodone in a 2-Center, Randomized, Double-Blind, Pilot Trial of Patients With Moderate to Severe Pain After Total Hip Replacement. Clin Ther 2012;34:1751–60. doi:10.1016/j.clinthera.2012.06.023 .

PubMed ID: PM:22795613