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Citation
Sun LP, Gong YH, Wang L, Yuan Y. Serum pepsinogen levels and their influencing factors: A population-based study in 6990 Chinese from North China. World J Gastroenterol 2007; 13(48): 6562-6567 [PMID: 18161928 DOI: 10.3748/wjg.v13.i48.6562]
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