1. Laboratory of Hygiene and Environmental Protection, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece
2. School of Social and Political Sciences, University of Glasgow, Glasgow G12 8RT, UK
3. Laboratory of Microbiology, National Kapodistrian University of Athens, 11527 Athens, Greece
4. Laboratory of Social Medicine, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece
5. Laboratory of Pharmacology, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece