The platelet-lymphocyte ratio improves the predictive value of serum CA19-9 levels in determining patient selection for staging laparoscopy in suspected periampullary cancer by Smith, Richard A., MRCS, Bosonnet, Lorraine, PGDip, Ghaneh, Paula, FRCS, Sutton, Robert, FRCS, Evans, Johnathan, FRCR, Healey, Priya, FRCR, Garvey, Connall, FRCR, Hughes, Mark, FRCR, Raraty, Michael, FRCS, Campbell, Fiona, FRCPath, Neoptolemos, John P., FRCS

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