title: Letter: Insertion of Hancock xenograft.
mesh_terms: D000818:Animals; D006350:Heart Valve Prosthesis / Q000379:methods*; D006801:Humans; D008943:Mitral Valve / Q000637:transplantation*; D013536:Suture Techniques; D013552:Swine; D014183:Transplantation, Heterologous / Q000379:methods*; D014261:Tricuspid Valve / Q000637:transplantation