1. Department of Medicine; Divisions of Infectious Diseases and Geriatric Medicine; University of Colorado; Aurora CO USA
2. Department of Medicine; Division of Infectious Diseases; Georgetown University Medical Center; Washington DC USA
3. Department of Epidemiology; Bloomberg School of Public Health; Johns Hopkins University; Baltimore MD USA
4. Bobby R. Alford Department of Otolaryngology-Head and Neck Surgery; Baylor College of Medicine; Houston TX USA
5. Epidemiology and Statistics Program; National Institute on Deafness and Other Communication Disorders (NIDCD); National Institutes of Health (NIH); Bethesda MD USA
6. Department of Medicine; Division of Infectious Diseases; Columbia University Medical Center; New York NY USA
7. Department of Medicine; Division of Endocrinology, Diabetes & Metabolism; Johns Hopkins University; Baltimore MD USA