1. Department of Research and Innovation, Haugesund Hospital, Helse Fonna Hospital Trust, Haugesund, Norway
2. Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
3. Department of Haematology, Oslo University Hospital, Oslo, Norway
4. Department of Pathology, Oslo University Hospital, Oslo, Norway
5. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
6. UCLH Centre for Waldenstrom macroglobulinaemia and Related Conditions, University College London Hospitals NHS Foundation Trust, London, UK