| http://www.w3.org/ns/prov#value | - The ring, or closed circuit, function of the ring holds and maintains the incorporated tissue in a circumferential fashion asillustrated in FIGS. 7, 8, 11 and 27.In one embodiment, as an alternative to the expandable umbrella struts, the expandable area of the device could expand by means of an inflatable member such as a balloon or balloons.
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