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Fagan’s normogram for the diagnosis of GC. (A) cut-off value with PG I ≤70 ng/mL and PG I/PG II ratio ≤3, (B) cut-off value with PG I ≤70 ng/mL, (C) cut-off value with PG I/PG II ratio ≤3. GC, gastric cancer; PG, pepsinogen; LR, likelihood raio.
