RT Journal Article SR Electronic T1 State of the science: opioids and survival in cancer pain management JF BMJ Supportive & Palliative Care JO BMJ Support Palliat Care FD British Medical Journal Publishing Group SP 379 OP 380 DO 10.1136/bmjspcare-2020-002624 VO 10 IS 4 A1 Boland, Jason W A1 Bennett, Michael I YR 2020 UL http://spcare.bmj.com/content/10/4/379.abstract AB