1. Institute of Pathology, School of Medicine University of Belgrade Belgrade Serbia
2. Section of Specialized Endocrinology, Department of Endocrinology Oslo University Hospital Rikshospitalet OsloNorway
3. Faculty of Medicine University of Oslo Oslo Norway
4. Department of Immunology, Genetics and Pathology Uppsala University UppsalaSweden
5. Department of Clinical Pathology Uppsala University Hospital Uppsala Sweden