Riaz, O. et al. 2017. FREQUENCY OF INCREASE IN SERUM TUMOR MARKER CARCINOEMBRYONIC ANTIGEN (CEA) LEVELS IN PRIMARY BREAST CANCER (PBC) PATIENTS AT THE TIME OF DIAGNOSIS: Serum Tumor Marker Carcinoembryonic Antigen Levels in PBC. Pakistan Armed Forces Medical Journal. 67, 2 (Apr. 2017), 322–26.