[Aortic valve surgery in the elderly].
Levang
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OW
D000367:Age Factors; D000368:Aged; D001022:Aortic Valve Insufficiency / Q000453:epidemiology / Q000601:surgery*; D001705:Bioprosthesis; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D009664:Norway / Q000453:epidemiology