APOH and venous thromboembolism: SLE: systemic lupus erythematosus; ESR: erythrocyte sedimentation rate; ANA: antinuclear antibody; anti-dsDNA: anti-double stranded DNA; LA: lupus anticoagulant; ACL: anticardiolipin; B2GP1: beta 2 glycoprotein 1; RF: rheumatoid factor; VTE: venous thromboembolism.