00502nas a2200193   4500000000100000000000100001008004100002100001400043700001200057700001500069700001600084700001500100700001200115700001400127245013300141300001200274490000800286022001400294       2016                            d1 aJ. Bedson1 aY. Chen1 aR. Hayward1 aJ. Ashworth1 aK. Walters1 aK. Dunn1 aK. Jordan00aTrends in long-term opioid prescribing in primary care patients with musculoskeletal conditions: an observational database study  a1525-310 v157  a0304-3959