Villegas-Pineda, Mario Hernán, and Carlos Andrés Palacio-García. “Case Report: Opioid Tolerance and Hyperalgesia After Abdominal Injury”. Colombian Journal of Anesthesiology 45, no. Supplement (April 1, 2017): 12–15. Accessed April 25, 2024. https://www.revcolanest.com.co/index.php/rca/article/view/436.