TF and Marchiafava-Bignami disease: Unfortunately, we did not record additional data on transfusion practices (age at transfusion, transfusion thresholds, number of transfusions), iron metabolism (ferritin, transferrin, iron supplementation), or post-transfusion electrolyte changes that could potentially help us elucidate the exact role of RBC transfusions in the pathophysiology of MBD.