PPH加外痔剥离术治疗Ⅲ、Ⅳ度脱垂痔的临床观察
PPH가외치박리술치료Ⅲ、Ⅳ도탈수치적림상관찰
Investigation of PPH and external hemorrhoidectomy in treatment of prolapsed hemorrhoids(grade Ⅲ°,Ⅳ°)
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