1. Division of Infectious Disease, Georgetown University Medical Center, Washington, District of Columbia, USA.
2. Department of Psychiatry, Georgetown University Medical Center, Washington, District of Columbia, USA.
3. School of Medicine, Georgetown University, Washington, District of Columbia, USA.
4. Department of Family Medicine, Georgetown University Medical Center, Washington, District of Columbia, USA.
5. Georgetown University Lombardi Comprehensive Cancer Center, Washington, District of Columbia, USA.
6. University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
7. Bucknell University, Lewisburg, Pennsylvania, USA.