1. Centre for Pharmacoepidemiology, Department of Medicine, Solna, Karolinska Institutet; Sweden
2. Clinical Epidemiology Unit, Department of Medicine, Solna, Karolinska Institutet; Sweden
3. Medical Products Agency; Uppsala Sweden
4. Department of Medical Sciences, Clinical Pharmacology; Uppsala University; Uppsala Sweden
5. Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet; Sweden