Symeonidi, M. Panagiotou, I. Parpa, E. Tsilika, E. Roumeliotou, A. Galanos, A. Mystakidou, K., Factors Affecting Opioid Treatment in Cancer Patients, Journal of Pharmacy and Pharmaceutical Sciences, (21), 256-267, 2019, Canadian Society for Pharmaceutical Sciences, 1482-1826