1. Department of Microbiology, Tumor and Cell Biology and Strategic Research Center IRIS, Karolinska Institutet, Stockholm, Sweden.
2. Swedish Institute for Infectious Disease Control, Stockholm, Sweden.
3. Department of Microbiology and Immunology, University of Melbourne, Melbourne, Victoria, Australia.
4. Venhälsan, South Hospital, Stockholm, Sweden.
5. Department of Molecular Virology, Linköping University, Linköping, Sweden.