| http://www.w3.org/ns/prov#value | - The semi-permeable membrane may comprise ePTFE, Dacron???, polyurethane, silicone rubber, poly(lactide-co-glycolide) (PLGA), poly(caprolactone) (PCL), poly(ethylene glycol) (PEG), collagen, polypropylene, cellulose acetate, poly(vinylidene fluoride) (PVDF), nafion or other biocompatible material.
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