1. Department of Microbiology, Tumor and Cell Biology, Karolinska Institute, Stockholm, Sweden
2. Department of Obstetrics and Gynecology, Central Hospital, Maputo, Mozambique
3. Department of Otolaryngology, Central Hospital Maputo, Mozambique
4. Department of Pathology, University Hospital Malmö, Lund University, Sweden
5. Department of Medical Microbiology, Malmö University Hospital, Lund University and Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden