内镜下改良(EMR)法与高频电切术治疗消化道难治性息肉的临床对比分析
내경하개량(EMR)법여고빈전절술치료소화도난치성식육적림상대비분석
Clinical comparative analysis on endoscopic improvement method and the high-frequency electric resection in the treatment of gastrointestinal refractory polyp
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