1. Department of Epidemiology; German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Arthur-Scheunert-Allee 114-116; Nuthetal 14558 Germany
2. Department of Nutritional Sciences; University of Vienna, Althanstraße 14, UZA II; Vienna 1090 Austria
3. German Nutrition Society, Godesberger Allee 18; Bonn 53175 Germany
4. Department of Public Health; Ghent University; Gent 9000 Belgium
5. Department of Public Health and Surveillance; Scientific Institute of Public Health (WIV-ISP), Rue Juliette Wytsmanstraat 14; Brussels 1050 Belgium
6. Institute for Biometry and Epidemiology, German Diabetes Center, Leibniz Institute for Diabetes Research at the Heinrich-Heine-University Düsseldorf; Düsseldorf D-40225 Germany