1. Institute of Polymers; Bulgarian Academy of Sciences; Akad. G. Bonchev St. 103A Sofia 1113 Bulgaria
2. Institute for Materials Research and Innovation; University of Bolton; Deane road Bolton Greater Manchester BL3 5AB UK
3. Faculty of Pharmacy; Medical University of Sofia; Sofia 1000 Bulgaria
4. Faculty of Biology; Sofia University “St. Kliment Ohridski”; 1164 Sofia Bulgaria
5. Institute of Molecular Biology; Bulgarian Academy of Sciences; Sofia 1113 Bulgaria