SERPING1 and autoimmune polyendocrinopathy: Factor XIIa-C1Inh was 1030.0 pM (IQR: 874.7-1231.3 pM) in thrombotic patients with APS and 1003.1 pM (IQR: 878.5-1123.0 pM) in obstetric patients with APS (P = .480) (Figure 1F).