1. Department of Pathophysiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
2. Department of Gastroenterology, Sismanoglio General Hospital, Athens, Greece
3. Department of Pathology, Evangelismos General Hospital, Athens, Greece
4. First Department of Pathology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
5. Department of Internal Medicine, Nicosia General Hospital, Nicosia, Cyprus
6. Thalassemia and Sickle Cell Disease Center, Laiko General Hospital, Athens, Greece
7. First Department of Internal Medicine, Laiko General Hospital, Athens, Greece
8. Department of Pathophysiology, Medical School, National and Kapodistrian University of Athens, Athnes, Greece