1. COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital University of Copenhagen Copenhagen Denmark
2. Section of Chemometrics and Analytical Technologies, Department of Food Science University of Copenhagen Copenhagen Denmark
3. Section for Clinical Mass Spectrometry, Danish Center for Neonatal Screening, Department of Congenital Disorders Statens Serum Institute Copenhagen Denmark
4. Department of Pediatrics Naestved Hospital Naestved Denmark
5. Channing Division of Network Medicine Brigham and Women's Hospital and Harvard Medical School Boston Massachusetts USA