Saleh, J. “Rol of Serum Angiopoietin-2 and Von Willebrand Factor in Renal Affection Syrian Patients With Systemic Lupus Erythematosus”. Tishreen University Journal -Medical Sciences Series, vol. 39, no. 4, Sept. 2018, https://journal.tishreen.edu.sy/index.php/hlthscnc/article/view/3998.