title: How do you spell 21 mm.
authors.forename: A
authors.initials: A
authors.lastname: Elami
authors.forename: L
authors.initials: L
authors.lastname: Caplan
authors.forename: E
authors.initials: E
authors.lastname: Rudis
mesh_terms: D001021:Aortic Valve / Q000601:surgery*; D001024:Aortic Valve Stenosis / Q000601:surgery*; D002138:Calibration; D017809:Fatal Outcome; D005260:Female; D006350:Heart Valve Prosthesis / Q000592:standards; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects*; D006801:Humans; D008875:Middle Aged; D011475:Prosthesis Failure