Correlation between mitral regurgitation grading and left ventricular ejection fraction in elderly patients:a follow-up study
曾平,龙梅菁,周颖玲,陈勇驰,张璐,卓胜青,田相亭,杨辉剑,连环,靖林林
Journal of Southern Medical University . 2012, (10): 1516 .