1. Department of Family Medicine and Community Health University of Wisconsin School of Medicine and Public Health Madison Wisconsin USA
2. Wisconsin Division of Public Health Wisconsin Department of Health Services Madison Wisconsin USA
3. Communicable Disease Division Wisconsin State Laboratory of Hygiene Madison Wisconsin USA
4. Department of Pediatrics, Division of Infectious Diseases University of Wisconsin School of Medicine and Public Health Madison Wisconsin USA
5. Department of Biostatistics and Medical Informatics University of Wisconsin School of Medicine and Public Health Madison Wisconsin USA
6. Division of Global Migration and Quarantine US Centers for Disease Control and Prevention Atlanta Georgia USA