blood was drawn from persons with sickle cell trait ( a/s ) , sickle cell anemia ( s/s ) , sickle cell/beta+ thalassemia ( s/beta+ thal ) and sickle cell/beta 0 thalassemia ( s/beta 0 thal ) and percentages of hb a2 and hb s were determined by each method .
C0037054
sickle
C0002895
sickle cell anemia