1. Penn State Hershey, Department of Health Evaluation Sciences, The Milton S. Hershey Medical Center College of Medicine, Hershey, Pennsylvania.
2. Department of Biostatistics, Bioinformatics and Epidemiology, Medical University of South Carolina, Charleston, South Carolina.
3. Department of Medicine, Division of General Internal Medicine/Geriatrics, Medical University of South Carolina, Charleston, South Carolina.
4. Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina.