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https://www.aafp.org/pubs/afp/issues/2017/1115/ol1.html Lidocaine Patches Are No Better Than Placebo for Somatic Back Pain | AAFP lidocaine patchesno better https://pubmed.ncbi.nlm.nih.gov/38760021/ The RELIEF feasibility trial: topical lidocaine patches in older adults with rib fractures