1. Karolinska Institutet, Stockholm, Sweden;
2. Cambridge Institute for Medical Research, Cambridge, United Kingdom;
3. Department of Clinical Immunology and Transfusion Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden;
4. Institute for Cancer Research, Oslo University Hospital Radiumhospitalet; and
5. Institute of Clinical Medicine, University of Oslo, Norway