@misc{indiciae74cb5ed019c7, title = {Multiple valve replacement: changing status.}, author = {P N West and T B Ferguson and R E Clark and C S Weldon}, year = {1978}, doi = {10.1016/s0003-4975(10)63626-0}, url = {https://pubmed.ncbi.nlm.nih.gov/666405/}, note = {Source identifier: 666405} }