1. Department of Psychology and NeuroscienceDuke UniversityDurhamNorth CarolinaUSA
2. Environmental Public Health Division, National Health and Environmental Effects Research LaboratoryU.S. Environmental Protection AgencyResearch Triangle ParkNorth CarolinaUSA
3. Department of Medicine, Division of Pulmonary and Critical Care MedicineDuke University Medical CenterDurhamNorth CarolinaUSA
4. Department of Pediatrics, Division of Neonatal MedicineDuke University Medical CenterDurhamNorth CarolinaUSA