1. Hepatology Division, Department of Upper GI Diseases Karolinska University Hospital Stockholm Sweden
2. Department of Medicine Huddinge, Karolinska Institutet Stockholm Sweden
3. Department of Endocrinology Karolinska University Hospital Stockholm Sweden
4. Centre for Inherited Metabolic Diseases (CMMS), Porphyria Centre Sweden Karolinska University Hospital Stockholm Sweden
5. Department of Molecular Medicine and Surgery Karolinska Institutet Stockholm Sweden
6. Department of Medical Biochemistry and Biophysics Karolinska Institutet Stockholm Sweden
7. Division of Biostatistics, Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
8. Unit for Clinical Epidemiology, Department of Medicine, Solna Karolinska Institutet Stockholm Sweden