1. Institute of Materials Science and Nanotechnology; National Nanotechnology Research Center (UNAM); Bilkent University; Ankara 06800 Turkey
2. Department of Biomedical Engineering; Department of Pathology; DJTMF Biomedical Nanotechnology Institute; University of Miami; Coral Gables FL 33136 USA
3. Institute of Fundamental Medicine and Biology; Kazan Federal University; Kazan 420021 Russia
4. Institute for Molecular Engineering; University of Chicago; Chicago IL 60637 USA