High dosage of a fixed combination oxycodone/naloxone prolonged release: efficacy and tolerability in patients with chronic cancer pain. - Amato F; Ceniti S; Mameli S; Pisanu GM; Vellucci R; Palmieri V; Consoletti L; Magaldi D; Notaro P; Marcassa C (Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer, 2017)