TY - RPRT TI - Mitral regurgitation due to intermittent prosthetic valvular dysfunction. AU - C J Carlson AU - J J Collins AU - I S Ockene AU - L H Cohn AU - J E Dalen PY - 1977 DO - 10.1378/chest.71.1.90 UR - https://pubmed.ncbi.nlm.nih.gov/830509/ ID - 830509 ER -