1. Institute of Clinical Epidemiology and Biometry University of Wuerzburg Wuerzburg Germany
2. State Institute of Health, Bavarian Health and Food Safety Authority Bad Kissingen Germany
3. Department of Health Security Finnish Institute for Health and Welfare Kuopio Finland
4. European Foundation for the Care of Newborn Infants (EFCNI) Munich Germany
5. Institute of Public Health and Clinical Nutrition University of Eastern Finland Kuopio Finland
6. Institute for Asthma and Allergy Prevention (IAP) Helmholtz Zentrum München1 Neuherberg Germany
7. Department of Pediatrics Kuopio University Hospital Kuopio Finland
8. Department of Medicine University of Eastern Finland Kuopio Finland
9. Department of Public Health University of Helsinki Helsinki Finland