1. Division of Cardiology (E.A., S.S.), Cotugno Hospital- A.O.R.N. Dei Colli, Naples.
2. Division of Cardiology, Umberto Parini Hospital, Aosta, Aosta Valley (S.A.).
3. First Division of Infectious Diseases (A.E.M., R.P.), Cotugno Hospital- A.O.R.N. Dei Colli, Naples.
4. Sub-intensive Care Unit and Respiratory Pathophysiology Department (M.M., G.F.), Cotugno Hospital- A.O.R.N. Dei Colli, Naples.
5. Respiratory Infectious Diseases Unit (A.D.R., R.P.), Cotugno Hospital- A.O.R.N. Dei Colli, Naples.
6. Department of Translational Medical Sciences, University of Campania Luigi Vanvitelli-Monaldi Hospital - A.O.R.N. Dei Colli, Naples, Italy (V.R.).