1. Department
of Pharmaceutical Technology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece
2. Theoretical
and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave, Athens 11635, Greece
3. Institute
of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria