1. Division of Pediatric Pulmonary Medicine, UPMC Children's Hospital of Pittsburgh University of Pittsburgh Pittsburgh Pennsylvania USA
2. Division of Environmental Health Sciences University of California Berkeley California USA
3. Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine Harvard Medical School and Harvard Pilgrim Health Care Institute Boston Massachusetts USA
4. Department of Pediatric Pulmonology and Pediatric Allergy, University Medical Center Groningen, Beatrix Children's Hospital University of Groningen Groningen The Netherlands
5. University Medical Center Groningen, GRIAC Research Institute University of Groningen Groningen The Netherlands
6. Behavioral Sciences Research Institute University of Puerto Rico San Juan Puerto Rico
7. Department of Statistics University of Pittsburgh Pittsburgh Pennsylvania USA
8. Department of Epidemiology, University Medical Center Groningen University of Groningen Groningen The Netherlands
9. Department of Psychology University of Pittsburgh Pittsburgh Pennsylvania USA
10. Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA
11. Department of Environmental Health Harvard School of Public Health Boston Massachusetts USA