1. Department of Epidemiology and Biostatistics, Imperial College London, UK
2. Department of Nutrition, Bjørknes University College, Norway
3. Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, Norway
4. Institute for Biometry and Epidemiology, German Diabetes Center, Leibniz Institute for Diabetes Research at Heinrich Heine University Düsseldorf, Düsseldorf, Germany