Khoshkhounejad, M. et al. 2019. Challenging Diagnosis of Severe Bilateral Cervicofacial Subcutaneous Emphysema following Root Perforation in a Maxillary Lateral Incisor: A Case Report. Iranian Endodontic Journal. 14, 3 (Jul. 2019), 220–224. DOI:https://doi.org/10.22037/iej.v14i3.23659.