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Titer of the autoantibody to Prdx1 in ESCC and normal human sera (NHS). The range of antibody titers to Prdx1 is expressed as the optical density (OD) obtained from ELISA. The y-axis represents the OD values; the x-axis represents serum samples: 1, NHS; 2, ESCC sera. The titer of anti-Prdx1 in ESCC was much higher than that in the NHS (P<0.01). Prdx1, peroxiredoxin 1; ESCC, esophageal squamous cell carcinoma.
