Mc Donnell, MD, MB C, Pehora, MN C, Crawford, MBBS MW. PCA-derived factors that may be predictive of postoperative pain in pediatric patients: A possible role for the PCA ratio. J of Opioid Management [Internet]. 2012 Jan. 1 [cited 2024 May 3];8(1):39-44. Available from: https://wmpllc.org/ojs/index.php/jom/article/view/789