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Citation
Li NP, Liu JQ, Zhou ZQ, Ji TY, Cai XY, Zhu QY. Ampulla dilation with different sized balloons to remove common bile duct stones. World J Gastroenterol 2013; 19(6): 903-908 [PMID: 23431070 DOI: 10.3748/wjg.v19.i6.903]
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