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Effect of Tramadol Versus Morphine on PD1 and PD1-ligand in Patients With Chronic Cancer Pain

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Trial data from ClinicalTrials.gov (U.S. public domain) and ISRCTN (CC BY 4.0), used with attribution. TrialLens is an independent index, not affiliated with or endorsed by ClinicalTrials.gov, the NIH, or any trial sponsor. For research only — not medical advice.