1. Department of Epidemiology, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
2. National Centre for Communicable Diseases Surveillance and Control, National Institute of Public Health, 050463 Bucharest, Romania
3. Military Medical Institute, 010919 Bucharest, Romania
4. Emergency Clinical Hospital for Children “Grigore Alexandrescu”, 011743 Bucharest, Romania
5. Department of Infectious Diseases I, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
6. National Institute for Infectious Diseases “Prof. Dr. Matei Balș”, 021105 Bucharest, Romania
7. Academy of Romanian Scientists, 050044 Bucharest, Romania
8. Epidemiology and Biostatistics Unit, Istituto Nazionale dei Tumori-IRCCS-Fondazione G. Pascale, 80131 Napoli, Italy
9. Department of Medical Psychology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
10. Department of Pediatrics, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania