1. Discipline of Pediatrics, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, 17-23 Plevnei Road, 010221 Bucharest, Romania
2. Department of Pediatrics, Grigore Alexandrescu Clinical Emergency Hospital for Children, 30-32 Iancu de Hunedoara Road, 011743 Bucharest, Romania
3. Department of Neurology, Grigore Alexandrescu Clinical Emergency Hospital for Children, 30-32 Iancu de Hunedoara Road, 011743 Bucharest, Romania
4. Department of Epidemiology, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 17-23 Plevnei Road, 010221 Bucharest, Romania
5. Department of Infection Prevention and Control, Grigore Alexandrescu Clinical Emergency Hospital for Children, 30-32 Iancu de Hunedoara Road, 011743 Bucharest, Romania