1. Vanderbilt University School of Medicine, Nashville, TN, USA
2. Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
3. Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
4. Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, USA