| http://www.w3.org/ns/prov#value | - to provide treatment to a patient positioned on the support surface, a retractable foot portion of the mattress including at least a portion of the inflatable treatment apparatus, the foot portion of the mattress and the remainder of the mattress cooperate to define a gap therebetween that widens as the foot section of the deck is moved from the bed position to the chair position. 84.
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