Cunha, Ana Sofia, and João Filipe Nunes Marques. “Accidental Subarachnoid Position of an Epidural Catheter”. Journal of the Portuguese Society of Anesthesiology 30, no. 1 (April 7, 2021). Accessed February 23, 2025. https://revistas.rcaap.pt/anestesiologia/article/view/20577.