1. Cambridge Institute for Medical Research and Department of Medicine; University of Cambridge School of Clinical Medicine; Addenbrooke's Hospital; Cambridge UK
2. Section of Immunology and Infection; Division of Applied Medicine; University of Aberdeen; Institute of Medical Sciences; Aberdeen UK
3. Cambridge Institute for Medical Research and Department of Haematology; University of Cambridge School of Clinical Medicine; Addenbrooke's Hospital; Cambridge UK
4. Department of Genetics; University of Erlangen; Erlangen Germany