1. Department of Microbiology, Faculty of Dental Medicine, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
2. Colentina Clinical Hospital, 020125 Bucharest, Romania
3. Department of Microbiology II, Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
4. “Cantacuzino” National Military Medical Institute for Research and Development, 050096 Bucharest, Romania