THE BSAE, S. G. Preemptive Analgesic Efficacy of Tramadol, Butorphanol, and Flurbiprofen in Lumpectomy: A Randomized, Controlled and Double-blind Trial. Science Insights, [S. l.], v. 11, n. 2, p. 322–329, 2015. DOI: 10.15354/si.14.ar006. Disponível em: https://bonoi.org/index.php/si/article/view/180. Acesso em: 17 apr. 2026.