1. National Capital Consortium Pediatrics Residency (Walter Reed National Military Medical Center), Bethesda, MD, USA
2. Department of Pediatrics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
3. Department Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
4. Department of Pediatrics, East Carolina University, Greenville, NC, USA
5. Department of Pediatrics, Walter Reed National Military Medical Center, Bethesda, MD, USA