| http://www.w3.org/ns/prov#value | - Chamber 550 may preferably be comprised of any biocompatible flexible, gas-permeable material, including, but not limited to, plastic or elastomeric polymers such as silicone, fluorinated polymers, ester- or vinyl-based polymers and polyolefin polymers, which also allows for the diffusion of gas from the environment into the chamber.
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