1. Tulane University Health Sciences Center, Department of Pediatrics, New Orleans, LA
2. Current affiliation: Charité University Medicine, Department of Pediatrics, Division of Pneumonology-Immunology, Berlin, Germany
3. The George Washington University School of Public Health and Health Services, Department of Epidemiology and Biostatistics, Washington, DC
4. Children's Hospital of New Orleans, New Orleans, LA
5. Ochsner Clinic Foundation, Department of Pediatrics, New Orleans, LA
6. Louisiana Department of Health and Hospitals, Center for Community Health, Metairie, LA