title: Invited commentary.
authors.affiliation: Department of Cardiothoracic Surgery, Stanford University, CVRB Building 2nd Floor, 300 Pasteur Drive, Stanford, CA 94305, USA. kotek1@stanford.edu
authors.forename: Tomasz A
authors.initials: TA
authors.lastname: Timek
mesh_terms: D000818:Animals; D003094:Collagen / Q000502:physiology; D008943:Mitral Valve / Q000294:innervation / Q000502:physiology*; D008944:Mitral Valve Insufficiency / Q000503:physiopathology
chemical_list: D003094:Collagen