patients were subdivided into two main groups : ( 1 ) refractory anemia without an excess of blasts ( raweb ) , grouping patients with refractory anemia ( ra ) and refractory anemia with ringed sideroblasts ( rars ) , and ( 2 ) refractory anemia with an excess of blasts ( raeb ) , grouping patients with refractory anemia with an excess of blasts ( raeb ) and refractory anemia with an excess of blasts in transformation ( raebt ) .
C0002893
refractory anemia
C0002894
refractory