APOH and Arterial thrombosis: Interestingly, levels of β2GPI were also lower in APS patients presenting with arterial thrombosis only (median 53.81% [IQR 39.38–74.62] [n = 67]) versus those presenting with venous thrombosis only (62.09% [IQR 49.64–83.11] [n = 59]) (P < 0.045), as shown in Supplementary Figure 4, http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1529-0131.