%0 Journal Article %A Georgia C Richards %T Treating postoperative pain? Avoid tramadol, long-acting opioid analgesics and long-term use %D 2019 %R 10.1136/bmjebm-2019-111236 %J BMJ Evidence-Based Medicine %P bmjebm-2019-111236 %U https://ebm.bmj.com/content/ebmed/early/2019/08/16/bmjebm-2019-111236.full.pdf