Drupal-Bibcite31<style face="normal" font="default" size="100%">Trends in long-term opioid prescribing in primary care patients with musculoskeletal conditions: an observational database study</style><style face="normal" font="default" size="100%">Trends in long-term opioid prescribing in primary care patients with musculoskeletal conditions: an observational database study</style>