[1] Acad Sci Czech Republ, Inst Macromol Chem, CR-16206 Prague 6, Czech Republic
[2] Charles Univ Prague, Ctr Cell Therapy & Tissue Repair, Prague 15006 5, Czech Republic
[3] Acad Sci Czech Republ, Inst Expt Med, Prague 14220 4, Czech Republic
[4] Inst Clin & Expt Med, Prague 14021 4, Czech Republic
[5] Acad Sci Czech Republ, Inst Phys, Prague 16253 6, Czech Republic