Sebastiano Mercadante1,2. 1. Main Regional Center for Pain Relief and Supportive/Palliative Care Unit, La Maddalena Cancer Center, Via San Lorenzo 312, 90146, Palermo, Italy. terapiadeldolore@lamaddalenanet.it. 2. Regional Home Palliative Care Program, SAMOT, Palermo, Italy. terapiadeldolore@lamaddalenanet.it.