| http://www.w3.org/ns/prov#value | - The electrodes 110A, 112A, 110B, and 112B may be made of a conducting ceramic, conducting polymer, and/or a noble or refractory metal, such as gold, silver, platinum, iridium, tantalum, titanium, titanium nitride, niobium, stainless steel, or their alloys that, e.g., minimize corrosion, electrolysis, and damage the surrounding tissues.
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