Adapted from Asherson et al.⁷ 

*Clinical evidence of vessel occlusion confirmed by imaging techniques. Renal involvement defined by 50% rise in serum creatinine, severe systemic hypertension (> 180/100 mm Hg), and/or proteinuria (> 500 mg/24 h).

†Significant evidence of thrombosis must be present but vasculitis may coexist.

‡aPL detected on 2 or more occasions at least 12 weeks apart as per Miyakis et al.²