| http://www.w3.org/ns/prov#value | - Oriented polyglycolide and polylactide-based polymers (and other polymeric materials listed below) that have been sized and formed into spring structures are particularly suitable for this variation. [0044] In any case, the associated covering or composition preferably is a polymeric material such as a biodegradable polymer, e.g., polyglycolic acid, polylactic acid, reconstituted collagen, poly-p-
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