1. Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina.
2. Department of Medicine, Duke University School of Medicine, Durham, North Carolina.
3. Department of Pediatrics, Duke University School of Medicine, Durham, North Carolina.
4. Centre for Immune Regulation (CIR), University of Oslo, Oslo, Norway.
5. LIIPAT, Department Pathology, Oslo University Hospital Rikshospitalet, Oslo, Norway.