Ansar Murtuza Hussain, Prakash RM Saldanha, Deepak Sharma, Aakash Pandita, and Monika Yachha, “Estimation of Zinc Levels in Children With Lower Respiratory Tract Infections: A Prospective Observational Study from India”, PNN, vol. 2, no. 3, pp. 91–98, Jan. 2016.