| http://www.w3.org/ns/prov#value | - Moreover, because the base frame 14 illustrated in FIG. 1A does not include structural members that are positioned directly between the bed 12 and the support surface 44, the height of the base frame 14, and thus the bed 12, above the support surface 44 can be reduced.Further, the base frame 14 can be formed from various materials such as metal, wood, plastic, composite materials, ceramic or any o
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