[1]
R. Vellucci, “Breakthrough cancer pain”, Eur J Oncol Env Hea, vol. 20, no. 1S, pp. 11–12, Feb. 2015, Accessed: Nov. 14, 2025. [Online]. Available: https://mail.mattioli1885journals.com/index.php/EJOEH/article/view/4224