经皮肾取石和输尿管镜碎石治疗嵌顿性输尿管上段结石的疗效比较
경피신취석화수뇨관경쇄석치료감돈성수뇨관상단결석적료효비교
A comparative study of percutaneous nephrolithotomy and ureteroscopic lithotripsy for the treatment of impacted upper ureteral stones
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