P Della Valle, L Crippa, AM Garlando, E Pattarini, O Safa, S Vigano D’Angelo, A D’Angelo. Interference of lupus anticoagulants in prothrombin time assays: implications for selection of adequate methods to optimize the management of thrombosis in the antiphospholipid-antibody syndrome. Haematologica 1999;84(12):1065-1074; https://doi.org/10.3324/%x.