1. Department of Pediatrics; Hans Christian Andersen Children's Hospital; Odense University Hospital; Odense Denmark
2. International Centre for Indoor Environment and Energy; Department of Civil Engineering; Technical University of Denmark; Lyngby Denmark
3. Environmental and Occupational Health Sciences Institute; University of Medicine and Dentistry of New Jersey and Rutgers University; Piscataway NJ USA
4. Department of Environmental and Occupational Medicine; University of Aarhus; Aarhus Denmark
5. Department of Environmental Medicine; University of Southern Denmark; Odense Denmark
6. Department of Children and Youth; Odense City Government and Administration; Odense Denmark