1. Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila” of Bucharest, 050474 Bucharest, Romania
2. Doctoral School of Medicine, “Ovidius” University of Constanta, 900470 Constanta, Romania
3. Emergency Clinical Hospital of Bucharest, 014461 Bucharest, Romania
4. Clinical Hospital of Infectious and Tropical Disease “Dr. Victor Babes” of Bucharest, 030303 Bucharest, Romania
5. National Institute of Infectious Disease “Prof. Dr. Matei Bals” of Bucharest, 021105 Bucharest, Romania
6. Faculty of Medicine, “Titu Maiorescu” University of Bucharest, 040441 Bucharest, Romania
7. Departament of Statistics and Actuarial-Financial Mathematics, Laboratory of Statistics and Data Analysis, University of Aegean, 83200 Samos, Greece
8. Clinical Infectious Disease Hospital of Constanta, 900178 Constanta, Romania
9. Romanian Academy of Medical Sciences, 030167 Bucuresti, Romania
10. Academy of Romanian Scientists, 030167 Bucuresti, Romania