Sorri, Farhad, Farshad Hashemian, Shahin Hajialikhani, and Mohammad Hossein Bakhshaei. “Preliminary Study of Pre-Hospital Pain Management and Comparison of Pain Management Methods in Emergency Patients”. Archives of Anesthesiology and Critical Care 7, no. 1 (February 1, 2021): 19-24. Accessed June 23, 2021. https://aacc.tums.ac.ir/index.php/aacc/article/view/312.