Hussein, Nagla, and Mohamed Khalid. “The Use of Doppler Ultrasound to Diagnose Deep Vein Thrombosis of the Lower Limbs”. British Journal of Healthcare and Medical Research 8, no. 4 (October 21, 2021): 7–13. Accessed December 19, 2025. http://116.203.177.230/index.php/BJHR/article/view/9302.