1. Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
2. Department of Statistics and Quantitative Methods; University of Milano-Bicocca; Milan Italy
3. AstraZeneca; Gaithersburg MD USA
4. Department of Clinical Science, Intervention and Technology; Karolinska Institutet; Stockholm Sweden
5. Department of Clinical Sciences; Danderyd University Hospital, Karolinska Institutet; Stockholm Sweden
6. Department of Medicine; Karolinska Institutet; Stockholm Sweden