1. Unit of Infectious Diseases; Department of Medicine, Huddinge; Karolinska Institute; Stockholm Sweden
2. Department of Infectious Diseases; Karolinska University Hospital; Stockholm Sweden
3. Department of Infectious Diseases; Sunderbyn Hospital; Luleå Sweden
4. Department of Infectious Diseases; University of Gothenburg; Gothenburg Sweden
5. Department of Clinical Science and Education; Venhälsan; South General Hospital; Stockholm Sweden
6. Division of Clinical Microbiology; Department of Laboratory Medicine; Karolinska Institute; Stockholm Sweden