Letter: Which prostitute valve?
D000328:Adult; D000818:Animals; D005069:Evaluation Studies as Topic; D006350:Heart Valve Prosthesis; D006801:Humans; D008875:Middle Aged; D008943:Mitral Valve / Q000637:transplantation*; D011183:Postoperative Complications / Q000401:mortality; D013552:Swine; D014183:Transplantation, Heterologous