1. AIAS, Aarhus Institute for Advanced Studies, Aarhus University; Høegh-Guldbergs Gade 6B Aarhus C Denmark
2. Department of Nutrition and Food Science; Rheinische Friedrich-Wilhelms University; Bonn Bonn Germany
3. Center for Spina Bifida Research; Prevention and Policy; Department of Epidemiology; Emory University Rollins School of Public Health; Atlanta Georgia
4. Chair of the Board of Directors of the University Bonn Medical Center, University Hospital of Bonn; Bonn Germany
5. Winterthur Institute of Health Economics; Zurich University of Applied Sciences; Winterthur Switzerland