1 National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, Athens, Greece. Electronic address: sgonos@eie.gr.
2 National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, Athens, Greece. Electronic address: nikichon@eie.gr.
3 Institute for Biological Research "Sinisa Stankovic", University of Belgrade, Belgrade, Serbia. Electronic address: anamikos@ibiss.bg.ac.rs.