Dashti Khavidaki, Gholamali, Aliakbar Keykha, Faranak Beirami, Masoum Khoshfetrat, and Fahimeh Shirazian. “The Effect of Using Pre-Operative Ketamine Injection on Post-Tonsillectomy Pain Intensity in Children”. Biomedical Research and Therapy 5, no. 02 (February 26, 2018): 2013-2021. Accessed March 28, 2024. http://bmrat.org/index.php/BMRAT/article/view/416.