1. Institute of Biophysics and Biomedical EngineeringBulgarian Academy of Sciences Sofia Bulgaria
2. Reutlingen UniversityFaculty of Applied Chemistry Reutlingen Germany
3. Biological Research Centre of the Hungarian Academy of SciencesInstitute of Biophysics Szeged Hungary
4. Department “Biomaterials”The Natural and Medical Sciences Institute at the University of Tübingen (NMI) Reutlingen Germany