1. Department of Medicine, Renal Unit, Kuopio University Hospital Kuopio, Finland
2. Department of Clinical Microbiology, Kuopio University Hospital Kuopio, Finland
3. Department of Dermatology, Kuopio University Hospital Kuopio, Finland
4. Department of Pathology Central Hospital of Jyväskylä, Jyväskylä Kuopio University Hospital Kuopio, Finland