laboratory diagnostic - PT EQA samples - serology - Protein Control, Level 1, liquid stable, 1x2ml, vial, unlabeled, 10 analytes: Antistreptolysin O, Complement C3, Complement C4, CRP, Ferritin, IgA, IgG, IgM, Rheumatoid Factor, Transferrin, code L23EQ1015, frt, todylaboratories®