1. Sickle Cell Trust (Jamaica); Southern Regional Health Authority; Mandeville Jamaica
2. MRC Molecular Haematology Unit; Weatherall Institute of Molecular Medicine; John Radcliffe Hospital; Oxford UK
3. King's College London School; Faculty of Life Sciences & Medicine; London UK
4. Department of Paediatric Oncology, Haematology and Immunology; Heidelberg University; Heidelberg Germany