1. Agency for Public Health, Lazio Region, Rome, Italy
2. Università Cattolica del Sacro Cuore, Rome, Italy
3. Bambino Gesù Children's Hospital, Rome, Italy
4. Azienda Sanitaria Locale Roma E, Rome, Italy
5. L. Spallanzani National Institute for Infectious Diseases (INMI), Rome, Italy
6. Azienda Ospedaliera S. Camillo-Forlanini, Rome, Italy