| http://www.w3.org/ns/prov#value | - When the apparatus is used for measuring a constituent, such a glucose, in the blood of a patient, such as a diabetic, the apparatus preferably further comprises a skin puncturing member mounted in the apparatus body member so as to be movable between retracted and extended positions, biassing means for biassing the puncturing member toward its extended position, and releasable locking means for r
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