title: Formaldehyde- versus glutaraldehyde-processed porcine bioprostheses in the aortic valve position: long-term follow-up.
mesh_terms: D001021:Aortic Valve / Q000601:surgery*; D001705:Bioprosthesis; D004868:Equipment Failure; D005500:Follow-Up Studies; D005557:Formaldehyde; D005976:Glutaral; D006350:Heart Valve Prosthesis; D006801:Humans
chemical_list: D005557:Formaldehyde; D005976:Glutaral