title: The Narrow Aortic Root. A Continuing Surgical Challenge.
authors.affiliation: Center of Cardiothoracic Surgery, University Hospital and Faculty of Medicine, Coimbra, Portugal. Electronic address: antunes.cct.chuc@sapo.pt.
authors.forename: Manuel J
authors.initials: MJ
authors.lastname: Antunes
mesh_terms: D001011:Aorta / Q000601:surgery; D001021:Aortic Valve / Q000601:surgery*; D006350:Heart Valve Prosthesis; D006801:Humans