分段开窗旷置结合切扩挂线置管引流术治疗复杂性肛瘘的安全性多中心临床研究
분단개창광치결합절확괘선치관인류술치료복잡성항루적안전성다중심림상연구
A Multicenter clinical trail of safety in operation of integrate subparagraph, fenestration, exclusion, cut expansion, seton, tube and drainage to treat for complex anal fistula
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