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Fig. 1 Multiple-electrode radiofrequency system (Cool-tip
radiofrequency Switching Controller, Valleylab) consists of 200-W monopolar
radiofrequency generator operating at 480 kHz (left, top box) and
switching system (left, bottom box) that can be used to power up to
three electrically independent electrodes (right) (SWCT1530,
Valleylab).