1. Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
2. Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN
3. Vanderbilt Office of Quality, Safety, and Risk Prevention, Vanderbilt University Medical Center, Nashville, TN
4. Department of Otolaryngology Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, TN
5. Vanderbilt-Ingram Cancer Center, Nashville, TN