C Smacchia, P Rebulla, F Drago, F Morelati, M Pappalettera and G Sirchia (1997) “A micro colorimetric assay using cryopreserved monocytes to evaluate antibody-mediated red cell-monocyte interaction”, Haematologica. Pavia, Italy, 82(5), pp. 526-531. doi: 10.3324/%x.