Imran Mahmood Khan ,Asma Shabbier ,Samiya Naeemullah ,Farah Rashid Siddiqui , Mahwish Rabia , Saba Naim Khan , Muhammad Tahir Chaudhary 2014. Efficacy of Vitamin C in Reducing Duration of Severe Pneumonia in Children. Journal of Rawalpindi Medical College. 18, 1 (Jun. 2014).