*Gestione Ambulatoriale Politerapie (GAP) Outpatient clinic, ASST Fatebenefratelli Sacco University Hospital, Milan, Italy;

†Department of Infectious Diseases, ASST Fatebenefratelli Sacco University Hospital, Milan, Italy; and

‡Department of Laboratory Medicine, ASST Fatebenefratelli Sacco University Hospital, Milan, Italy.

Correspondence: Dario Cattaneo, PharmD, PhD, Department of Infectious Diseases, ASST Fatebenefratelli Sacco University Hospital, Milano 20157, Italy (e-mail: [email protected]).

The authors declare no conflict of interest.

D. Cattaneo and C. Gervasoni supervised all the stages of the study and wrote the first draft of the manuscript. N. Calvagna and IB performed the pharmacokinetic analyses and revised the draft manuscript, whereas S. Caronni, B. Caloni, and A. Giacomelli took care of the patient and revised the draft manuscript.