1. Pineta Grande Hospital, Castel Volturno (Caserta), Italy
2. Center for Public Health Research, University of Milan—Bicocca, Monza, Italy
3. Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
4. Center of Excellence for the Acceleration of HArm Reduction (CoEHAR), University of Catania, Catania, Italy
5. Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
6. IRCCS MultiMedica, Sesto San Giovanni (Milan), Italy