title: Invited commentary.
authors.affiliation: Division of Cardiovascular Surgery, Mayo Clinic, 200 First St SW, Rochester, MN55905. Electronic address: jdearani@mayo.edu.
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Dearani
mesh_terms: D000818:Animals; D001705:Bioprosthesis; D006348:Cardiac Surgical Procedures / Q000379:methods*; D005260:Female; D006084:Graft Rejection; D006330:Heart Defects, Congenital / Q000601:surgery*; D006801:Humans; D007413:Intestinal Mucosa / Q000637:transplantation*; D008297:Male