Reactivity of patient samples of cohort 1 in two different anti-β2GPI assays.

20 selected patient samples, with the indicated characteristics, were tested for reactivity against coated β2GPI in assay A and assay B. Samples were considered strong positive (+++), positive (++) and weak positive (+) according to the recommendations of the manufacturers.1Arterial or venous thrombosis.2Activated partial thromboplastin time/dilute Russell's Viper Venom time.3Antibody reactivity against epitope G40-R43 of domain I of β2GPI, as described previously [3], [4], [5].