| http://www.w3.org/ns/prov#value | - The surface of the space-occupying device and/or the locking member may be coated with radio-opaque materials to enhance detection of the device while it is positioned in a patient's stomach. [0055] In an alternative design, the extragastric balloon 36 may be substituted with a viscous, curable bolus of a material such as collagen or other biocompatible polymer.
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