Stratification according to tumor location revealed that proximal tumors possessed lower sPGI and sPGII levels as compared with distal tumors, but did not reach statistical significance after adjustment for confounders ( P PGI = 0.074, P PGII = 0.083).
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Age-Specific Gastric Cancer Risk Indicated by the Combination of Helicobacter pylori Sero-Status and Serum Pepsinogen Levels.
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