1. Labnet Laboratories, Thessaloniki, Greece.
2. Laboratory of Microbiology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece.
3. Department of Microbiology, St. Paul General Hospital of Thessaloniki, Thessaloniki, Greece.
4. Laboratory of Biological Chemistry, Medical Department, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.
5. Department of Microbiology, AHEPA University Hospital, Thessaloniki, Greece.