1. Division of Clinical Microbiology, Helsinki University Hospital, HUSLAB, Helsinki, Finland;
2. Department of Infectious Diseases, Danderyds Hospital, Stockholm, Sweden;
3. Bandim Health Project, Indepth Network, Bissau, Guinea-Bissau;
4. Department of Microbiology, Tumour and Cell Biology, Karolinska Institutet, Stockholm, Sweden;
5. Unit of Infectious Diseases, Solna, Karolinska Institutet, Stockholm, Sweden;
6. Centre for Clinical Research, Sörmland County Council, Eskilstuna, Sweden and Uppsala University, Uppsala, Sweden;
7. Department of Paediatrics, Kolding Hospital/IRS University of Southern Denmark, Kolding, Denmark;
8. Clinic of Infectious Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland