O Safa, L Crippa, P Della Valle, MG Sabbadini, S Vigano D’Angelo, A D’Angelo. IgG reactivity to phospholipid-bound beta(2)-glycoprotein I is the main determinant of the fraction of lupus anticoagulant activity quenched by addition of hexagonal (II) phase phospholipid in patients with the clinical suspicion of antiphospholipid-antibody syndrome. Haematologica 1999;84(9):829-838; https://doi.org/10.3324/%x.