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Citation
Xie P, Ren J, Bardan E, Kerm M, Shaker R. Comparision of the lower esophageal sphincter in healthy young and eledrly subjects. World J Gastroenterol 1996; 2(Suppl1): 142-142 [DOI: 10.3748/wjg.v2.iSuppl1.142]
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