1. Depto de Electricidad y Electrónica, Universidad del País Vasco (UPV/EHU), 48080 Bilbao, Spain
2. Institute of Natural Sciences, Ural Federal University, 620000 Ekaterinburg, Russia
3. BCMaterials, Universidad del País Vasco (UPV/EHU), 48080 Bilbao, Spain
4. Institute of Electrophysics UD RAS, 620016 Ekaterinburg, Russia
5. Department of Biomedical Physics and Engineering, Ural State Medical University, 620028 Ekaterinburg, Russia