| Namespace | disease_ontology | Obsolete | false |
| description | A blood platelet disease characterized by autosomal dominant inheritance of increased bleeding tendency, gray platelets, thrombocytopenia, thrombasthenia, abnormal megakaryocytes, decreased or absent alpha-granules in platelets, and myelofibrosis that has_material_basis_in heterozygous mutation in the GFI1B gene on chromosome 9q34. |
