经胸超声心动图在高海拔地区儿童房间隔缺损封堵术中的应用
경흉초성심동도재고해발지구인동방간격결손봉도술중적응용
Clinical Application of Transthoracic Echocardiography in Transcatheter Closure Ostium Secundum of Atrial Septal Defects in Children at High Altitude
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