1. Saint Camillus International University of Rome and Medical Sciences (UniCamillus), Rome, Italy.
2. National Centre for Diseases Prevention and Health Promotion—National Institute of Health, Rome, Italy.
3. Department of Biomedicine and Prevention—University of Rome Tor Vergata, Rome, Italy.
4. Unit of Clinical Epidemiology, Bambino Gesù Children's Hospital, Rome, Italy.
5. National Institute for Infectious Diseases “Lazzaro Spallanzani,” Rome, Italy.