Ansar Murtuza Hussain (2016) “Estimation of Zinc Levels in Children With Lower Respiratory Tract Infections: A Prospective Observational Study from India”, Pediatrics and Neonatal Nursing, 2(3), pp. 91–98. Available at: https://openventio.us/index.php/PNN/article/view/548 (Accessed: 26 August 2026).