1. From the Division of Infectious Diseases Department of Medicine Solna Karolinska InstitutetStockholm Sweden
2. Department of Infectious Diseases Karolinska University Hospital Stockholm Sweden
3. Public Health Agency of Sweden Solna Sweden
4. Department of Microbiology, Tumor and Cell Biology Karolinska InstitutetStockholm Sweden
5. Department of Clinical Microbiology Karolinska University Hospital Stockholm Sweden
6. SCELSE and LKCNanyang Technological UniversityNTU Singapore Singapore
7. Department of Medicine Solna Clinical Epidemiology Unit Karolinska InstitutetKarolinska University HospitalStockholm Sweden
8. Department of Communicable Disease Control and Prevention Stockholm County Council Stockholm Sweden