title: Reply to the editor.
authors.affiliation: Boston Children's Hospital, Boston, Mass.
authors.forename: Stephen P
authors.initials: SP
authors.lastname: Sanders
authors.affiliation: Boston Children's Hospital, Boston, Mass.
authors.forename: Robert F
authors.initials: RF
authors.lastname: Padera
mesh_terms: D000818:Animals; D001021:Aortic Valve / Q000601:surgery*; D006348:Cardiac Surgical Procedures / Q000379:methods*; D005109:Extracellular Matrix / Q000637:transplantation*; D005260:Female; D006330:Heart Defects, Congenital / Q000601:surgery*; D006801:Humans; D007413:Intestinal Mucosa / Q000637:transplantation*; D008297:Male; D008943:Mitral Valve / Q000601:surgery*; D010496:Pericardium / Q000637:transplantation*; D019651:Plastic Surgery Procedures / Q000379:methods*