Study to Assess Iron Chelation Therapy in Patients With Chronic Iron Overload

Inclusion Criteria: Male and female adult patients suffering from chronic iron overload * who never received an iron chelator directly before starting an iron chelation therapy * who received an iron chelation therapy for less than 6 month * who interrupted an iron chelation therapy for longer than 6 months and will receive an iron chelation therapy again * who signed the informed consent Exclusion Criteria: \-