1. Department of Clinical Pathology, Faculty of Medicine, Assiut University, Assiut, Egypt;
2. National Haemoglobinopathy Reference Laboratory, Oxford Radcliffe Hospitals National Health Service Trust, Oxford, UK;
3. Department of Oncology, Molecular Haematology, Molecular Diagnostics Centre, Churchill Hospital, Oxford, UK;
4. Clinical Hematopathology Department, College of Medicine, Najran University, Najran City, Kingdom of Saudi Arabia