小腰大边封堵器和对称封堵器经导管介入治疗巨大囊袋形室间隔缺损的对比研究
소요대변봉도기화대칭봉도기경도관개입치료거대낭대형실간격결손적대비연구
Comparative study of transcatheter intervention of VSD with large sack with thin-waist-big-side occluder and symmetrical occluder
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