1Department of Women's and Children's Health, Childhood Cancer Research Unit, Astrid Lindgren Children's Hospital, Karolinska Institutet, Stockholm, Sweden
2Department of Microbiology, Public Health Agency of Sweden, Solna, Sweden
3Department of Clinical Microbiology, Karolinska University Hospital, Stockholm, Sweden
4Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
5Department of Medicine Solna/Unit for Infectious Diseases, Karolinska Institutet, Stockholm, Sweden