Farkhanda Akhtar Abbasi, Shafia Naeem, Ayesha Anwar,Faisal Mahmood,Umar Liaqat. 2013. “Two-Point Compression Ultrasonography for Lower Extremity Deep Venous Thrombosis in Comparison to Whole-Leg Duplex Ultrasonography”. Journal of Rawalpindi Medical College 17 (1). https://journalrmc.com/index.php/JRMC/article/view/509.