1. University of Ioannina,Unit of Medical Technology and Intelligent Information Systems,Department of Materials Science and Engineering,Ioannina,GR,Greece,45110
2. National Research Council,Institute of Clinical Physiology,Pisa,Italy,56124
3. University of Ioannina,Unit of Medical Technology and Intelligent Information Systems,Dept. of Materials Science and Engineering,Ioannina,GR,Greece,45110