Other very rare types of CDA are caused by autosomal dominant mutations in KIF23 (Kinesin Family Member 23, CDA type III), KLF1 (Kruppel-Like Factor 1, CDA type IV) or X-linked mutations in GATA1 (GATA Binding Protein 1, X-linked thrombocytopenia with or without dyserythropoietic anemia) [56,57,58]. The gene discussed is KLF1; the disease is hereditary thrombocytopenia with normal platelets.