1. Department of Pediatrics, Institute of Clinical Sciences, Sahlgrenska Academy, 41685 Gothenburg, Sweden
2. Queen Silvia Children’s Hospital, 41685 Gothenburg, Sweden
3. Nordic School of Public Health, 40242 Gothenburg, Sweden
4. Rheumatology Unit, Department of Medicine, Karolinska Institutet, 17176 Stockholm, Sweden
5. Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy, Gothenburg, Sweden