Pabón-Muñoz, Favio Ernesto, Carlos Andrés Luna-Montúfar, and Martín Ramiro Paredes. 2019. “The Ultrasound-Guided Erector Spinae Plane (ESP) Block in Chronic Pain Due to Bone Metastasis: Case Report”. Colombian Journal of Anesthesiology 47 (2):128-31. https://www.revcolanest.com.co/index.php/rca/article/view/291.