1. Nanobioengineering
Group, Institute for Bioengineering of Catalonia (IBEC), Baldiri Reixac
15-21, 08028 Barcelona, Spain
2. Department
of Engineering: Electronics, University of Barcelona, 08028 Barcelona, Spain
3. Centro de Investigación
Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina
(CIBER-BBN), 28029 Madrid, Spain