1. Research and Advocacy Directorate, Myeloma UK , Edinburgh EH7 4HG, United Kingdom
2. Department of Cancer Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London , London, WC2R 2LS, United Kingdom
3. Clinical Imaging and Medical Physics, Guy’s and St Thomas’ NHS Foundation Trust , London, SE1 9RT, United Kingdom
4. Clinical Haematology, University Hospitals Birmingham NHS Foundation Trust , Birmingham, B15 2WB, United Kingdom