1. University of Ostrava, Czech Republic; University Hospital Ostrava, Czech Republic; VSB-Technical University of Ostrava, Czech Republic
2. VSB-Technical University of Ostrava, Czech Republic
3. University of Ostrava, Czech Republic; University Hospital of Ostrava, Czech Republic
4. University Hospital Ostrava, Czech Republic
5. University of Ostrava, Czech Republic; University Hospital Ostrava, Czech Republic
6. Alexandria University, Egypt