1. Division of Diabetes, Endocrinology and Metabolism, Vanderbilt University Medical Center, Nashville, TN, USA
2. Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
3. Division of Infectious Diseases, Vanderbilt University Medical Center, Nashville, TN, USA
4. Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA