Borges, L. A., Leal, P. da C., Moura, E. C. R. and Sakata, R. K. (2017) “Randomized clinical study on the analgesic effect of local infiltration versus spinal block for hemorrhoidectomy”, São Paulo Medical Journal, 135(3), pp. 247–252. Available at: https://periodicosapm.emnuvens.com.br/spmj/article/view/786 (Accessed: 10 March 2025).