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 April 25, 2024. https://journals.scholarpublishing.org/index.php/JBEMi/article/view/9302.