| http://www.w3.org/ns/prov#value | - d addressed in particular the problems of improving the device's wearability on the part of the user and of avoiding skin irritation caused by pH shifts at the electrodes.Document D2, which showed an iontophoresis device according to the preamble of claim 1 of the main request, taught to use an electrode comprising a chemical species adapted to undergo oxidation or reduction in order to avoid or m
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