华法林低强度抗凝对高龄老年非瓣膜病性心房颤动抗栓治疗的安全性
화법림저강도항응대고령노년비판막병성심방전동항전치료적안전성
The safety of lower anticoagulate intensity of warfarin in treating nonvalvular atrial fibrillation in elderly patients
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