Matava, MBCHB, Clyde T., Mark W. Crawford, MBBS, Carolyne Pehora, RN, Basem Naser, MD, and Conor McDonnell, MBCHB. 2014. “Early Postoperative Patient-Controlled Analgesia Ratio Predicts 24-Hour Morphine Consumption and Pain in Children Undergoing Scoliosis Surgery”. Journal of Opioid Management 10 (1):39-45. https://doi.org/10.5055/jom.2014.0190.