| http://www.w3.org/ns/prov#value | - (a) a pad removably attachable to said patient, said pad comprising a plurality of expandable cells attached to a backing, said pad including means for attaching said pad to said patient; (b) a plurality of pressure transducers attached to said plurality of expandable cells, said pressure transducers being adapted to generate a signal that is directly related to an interface pressure between said
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