Heydari, Farhad, Babak Masoumi, Majid Zamani, and Mohammad Nasr-Esfahani. “Prospective Evaluation of Safe Observation Period After Asymptomatic Penetrating Thoracic Injury: 1 Hour Is Enough”. Advanced Journal of Emergency Medicine 3, no. 4 (June 22, 2019): e39. Accessed September 17, 2019. http://ajem.tums.ac.ir/index.php/ajem/article/view/148.