1. Division of Infectious Diseases and Dermatology, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden
2. Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
3. Division of Medical Virology, Department of Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
4. Molecular Microbiology and Immunology, University of Missouri, Columbia, Missouri, USA
5. Department of Clinical Microbiology and Infectious Diseases, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden