Agurto Zurita J, Jarama Solarte N, Allauca Arevalo R, Vaca Mendieta C. 20 cases of fentanyl-associated ataranalgesia. Revista UG [Internet]. 1994 Dec. 31 [cited 2026 Apr. 17];91(3):51-62. Available from: https://revistas.ug.edu.ec/index.php/rug/article/view/616