经皮冠状动脉腔内成形支架术治疗无保护左主干狭窄9例
경피관상동맥강내성형지가술치료무보호좌주간협착9례
Treatment of 9 cases with unprotected left main branch stenosis of coronary artery using percutaneous transluminal coronary angioplasty(PTCA)
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