Main features and included projects：■ Two levels of abnormal and normal values, mimics human serum matrix, no matrix effects
■ Contains 14 items: rheumatoid factor, streptococcal hemolysin O, C-reactive protein, a1-microglobulin, β2-microglobulin, prealbumin, retinol-binding protein, cystatin C, immunoglobulin E, immunoglobulin G, immunoglobulin A, immunoglobulin M, complement C3, complement C4;
■ Shelf-life more than two years, -20 ℃ storage stability of 28 days after re-solution
