Inamullah Khan Afridi, et al. “DOES PRESERVATION OF PULMONARY VALVE THROUGH TRANSATRIAL AND TRANSVENTRICULAR APPROACH IN PRIMARY REPAIR OF TETROLOGY OF FALLOT IMPROVES CLINICAL OUTCOMES: A PILOT STUDY AT AFIC NIHD”. Pakistan Armed Forces Medical Journal, vol. 67, no. SUPPL-2, Apr. 2017, pp. S232-36, https://pafmj.org/PAFMJ/article/view/11919.