1. Department of Biomedical Engineering Technion – Israel Institute of Technology Haifa 32000 Israel
2. Department of Histology and Embryology Faculty of Medicine Masaryk University Brno 625 00 Czech Republic
3. Department of Biomedical Engineering Carnegie Mellon University Pittsburgh PA 15213 USA
4. Cell and Tissue Regeneration International Clinical Research Center St. Anne's University Hospital Brno Brno 65691 Czech Republic