Tovar-Gutiérrez, A., Camelo-Rincón, J. E., Vásquez-Gómez, Óscar I. and Cadavid-Puentes, A. M. (2021) “Continuous erector spinae plane block at lumbar level for relief of severe pain due to hip fracture: case series”, Colombian Journal of Anesthesiology, 49(4). doi: 10.5554/22562087.e962.