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APA Citation
Schaefer, U., Conradi, L., Lubos, E., Deuschl, F., Schofer, N., Seiffert, M., Treede, H., Schirmer, J., Reichenspurner, H., & Blankenberg, S. (n.d.). first in human implantation of the mechanical expanding Lotus® valve in degenerated surgical valves in mitral position. Catheterization and cardiovascular interventions, 86(7), 1280–1286. http://access.bl.uk/ark:/81055/vdc_100027819733.0x000050