or
Serum Control Set, hCG; Genzyme OSOM; For qc testing w/ OSOM hCG Combo Test; 5mL vial neg. control contains horse serum with 0.2% sodium azide; 5mL vial pos. control contains 50 mIU/mL hCG (3rd IS) in horse serum with 0.2% sodium azide