1. Department of Internal Medicine, American University of Beirut, Beirut, Lebanon
2. Department of Internal Medicine, Yale School of Medicine, Waterbury Hospital, CT, USA
3. School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
4. Department of Clinical and Administrative Pharmacy, University of Georgia College of Pharmacy, Albany, GA, USA
5. Department of Medicine, Division of Infectious Diseases, University of Colorado Denver, Aurora, CO, USA
6. Hospital Infantil de México, Federico Gómez, México City, México
7. Department of Medicine, Division of Infectious Diseases, University of Colorado Denver, 12700 E. 19th Avenue, Mail Stop B168. Aurora, CO 80045, USA
8. Rocky Mountain Regional Veterans Affairs Medical Center, Aurora CO, USA