| http://www.w3.org/ns/prov#value | - The electrodes (142) 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 or their alloys that are biocompatible, e.g., minimize corrosion, electrolysis, and damage to the surrounding tissues.
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