1. School of Medicine, University of Virginia, Charlottesville, VA 22903, USA
2. Division of Infectious Diseases, Department of Internal Medicine, University of Virginia, Charlottesville, VA 22903, USA
3. Department of Plastic and Maxillofacial Surgery, University of Virginia, Charlottesville, VA 22903, USA
4. Department of Internal Medicine, University of Virginia, Charlottesville, VA 22903, USA