1. Oslo Center for Biostatistics and Epidemiology Department for Biostatistics, IMB University of Oslo Oslo Norway
2. Department of Medicine Diakonhjemmet Hospital Oslo Norway
3. Leibniz Institute for Prevention Research and Epidemiology—BIPS Bremen Germany
4. Faculty of Mathematics/Computer Science University of Bremen Bremen Germany
5. Division of Population Medicine Cardiff University UK
6. Institute of Clinical Biometrics Center for Medical Statistics, Informatics, and Intelligent Systems Medical University of Vienna Vienna Austria
7. Department of Epidemiology Center for Public Health Medical University of Vienna Vienna Austria