@article {Richards110, author = {Georgia C Richards}, title = {Treating postoperative pain? Avoid tramadol, long-acting opioid analgesics and long-term use}, volume = {25}, number = {3}, pages = {110--111}, year = {2020}, doi = {10.1136/bmjebm-2019-111236}, publisher = {Royal Society of Medicine}, issn = {2515-446X}, URL = {https://ebm.bmj.com/content/25/3/110}, eprint = {https://ebm.bmj.com/content/25/3/110.full.pdf}, journal = {BMJ Evidence-Based Medicine} }