1. Molecular Haematology; Faculty of Life Sciences & Medicine; King's College London; London UK
2. Department of Haematological Medicine; King's College Hospital NHS Foundation Trust; London UK
3. Division of Hematology/Oncology; Children's Hospital and Research Center Oakland; Oakland CA USA
4. National Institutes of Health/National Heart Lung and Blood Institute; Sickle Cell Branch; Bethesda MD USA