Background Diamond-Blackfan anemia is a rare. pure red blood cell aplasia of childhood due to an intrinsic defect in erythropoietic progenitors. About 40% of patients display various malformations. Anemia is corrected by steroid treatment in more than 50% of cases; non-responders need chronic transfusions or stem cell transplantation. https://www.fitnessgravesyardes.shop/product-category/pedal-arm-pivot/