FASLG and autoimmune polyendocrinopathy: APS is a rare and complex autoimmune disease characterized by recurrent venous and/or arterial thrombosis and pregnancy complications in the presence of antiphospholipid antibodies (aPL), including anticardiolipin antibodies and anti‐β2 glycoprotein I (anti‐β2GPI) antibodies, as well as lupus anticoagulant.385