1. Department of Mechanical Engineering, Universidade Federal de Minas Gerais, Belo Horizonte - Brazil
2. BIOtech research centre on Biomedical Technologies, University of Trento, Mattarello Trento - Italy
3. Department of Nephrology, S. Chiara Hospital, Trento - Italy
4. Section of Electron Microscopy, Department of Medicine Laboratory, Azienda Provinciale per i Servizi Sanitari di Trento, Trento - Italy