| prov:value
| - A number of appropriate bulking agents are known to those skilled in the art, including, but not limited to, those derived from natural tissue, for example human and animal collagen, muscle, fat and cartilage, and those derived from synthetic materials, such as silicone, polymethylmethacrylate, polyethylene, polypropylene, polypropylene, Delrin, and Teflon.
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