Trials. 2023 Jul 27;24(1):479. doi: 10.1186/s13063-023-07525-4.
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PMID:37501161 | DOI:10.1186/s13063-023-07525-4
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Correction: OPAL: a randomised, placebo-controlled trial of opioid analgesia for the reduction of pain severity in people with acute spinal pain-a statistical analysis plan
