[1] Univ Trent, Dept Phys & BIOtech, I-38123 Mattarello, Italy
[2] Univ Pompeu Fabra, Dept Informat & Commun Technol, Barcelona 08018, Spain
[3] Univ Florida, J Crayton Pruitt Family Dept Biomed Engn, Gainesville, FL 32611 USA
[4] Aristotle Univ Thessaloniki, Fac Engn, Dept Math Phys & Computat Sci, Thessaloniki 54124, Greece