1. Department of Internal Medicine, Division of Infectious Diseases, University of California Davis, Sacramento, California, USA
2. Department of Pharmacy, Tri-City Medical Center, Oceanside, California, USA
3. Department of Medicine, Division of Infectious Diseases, Duke University School of Medicine, Durham, North Carolina, USA
4. Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, Texas, USAand
5. Division of Infectious Diseases, Department of Medicine, University of California San Francisco, San Francisco, California, USA