title: Invited commentary.
authors: Cardiovascular Surgery, St Joseph's Hospital, 45 W Exchange, St Paul, MN 55102, USA. rwemery@healtheast.org
authors: Robert W
authors: RW
authors: Emery
authors: David L
authors: DL
authors: Joyce
mesh_terms: D001021:Aortic Valve; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D011475:Prosthesis Failure