prov:value
| - The reservoir may contain a substance contained in a hydrogel, where the hydrogel may be made of materials that are well known in the art such as synthetic polymers, including but not limited to, simethicone, silica gel, silica rubber, polyvinyl alcohol, polyethylene glycol, polymethacrylate, polypropyleneglycol, copolymers and derivatives with and without cross-linking and other polymers such as
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