1. Nasco AD Biotechnology Laboratory, 11 Sachtouri Str, 18536 Pireus, Greece
2. Division of Hygiene and Medical Microbiology, Medical University of Innsbruck, Schöpfstr. 41, 6020 Innsbruck, Austria
3. National Hellenic Research Foundation, 48 Vas. Konstantinou Av., 11635 Athens, Greece