title: Long-term follow-up of the Björk-Shiley prosthetic valve used in the mitral position.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis; D006801:Humans; D008875:Middle Aged; D008943:Mitral Valve; D008944:Mitral Valve Insufficiency / Q000401:mortality / Q000601:surgery; D008946:Mitral Valve Stenosis / Q000401:mortality / Q000601:surgery; D013997:Time Factors