| http://www.w3.org/ns/prov#value | - That is, the various device insertion, positioning, and retraction embodiments can be used to provide for the insertion, positioning, and/or retraction of one or more medical devices, such that any type of procedure or related device for use in a body cavity can be inserted into, positioned within, and/or retracted from the space, including the various devices and procedures disclosed and incorpor
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