Low serum pepsinogen I and pepsinogen I/II ratio and Helicobacter pylori infection are associated with increased risk of gastric cancer: 14‐year follow up result in a rural Chinese community
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Xianghong Zhang | J. Cui | L. Xing | Jun-ling Wang | Liqin Wang | J. Misumi | Liying Xue | Juan Wang | Jian-min Mi | X. Xing | Zhanjun Du | Qingbao Tian