Gianni, W.; Di Carlo, M.; Colangelo, L.; Della Grotta, G.; Sonato, C.; Cilli, M.; Toto, A.; Minisola, S. Short-Term Efficacy of a Fixed Association of Palmitoylethanolamide and Other Phytochemicals As Add-on Therapy in the Management of Chronic Pain in Elderly Patients: A Real-World Retrospective Study. Geriatr Care 2018, 4.