低分子肝素与利伐沙班对老年股骨颈骨折术后隐性失血影响的对比观察
저분자간소여리벌사반대노년고골경골절술후은성실혈영향적대비관찰
Effects Comparison between Low Molecular Heparin and Rivaroxaban in Hidden Blood Loss after the Operation of Femoral Neck Fracture in the Elderly
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