Raza, Mehdi, and Mujahid Khalid Ali. “VALIDITY OF LUNG PERFUSION SPECT SCAN MATCHED WITH A CHEST RADIOGRAPH IN ACUTE PULMONARY EMBOLISM”. Pakistan Armed Forces Medical Journal 63, no. 4 (December 31, 2013): 534–38. Accessed May 29, 2025. https://www.pafmj.org/PAFMJ/article/view/2159.