1. Electronics & Informatics, Vrije Universiteit of Brussel, 1050 Brussels, Belgium
2. Center for Semiconductor Components and Nanotechnologies, State University of Campinas, Campinas 13083-852, Brazil
3. School of Electrical and Computer Engineering, State University of Campinas, Campinas 13083-852, Brazil
4. BioSense Institute, University of Novi Sad, 21000 Novi Sad, Serbia