Tahir Mehmood, Kulsoom, Rabia, Wahid, Ume Kalsoom, Asma Asghar. “Study of Lower Respiratory Tract Infections in Children in a Tertiary Care Hospital”. Pakistan Journal of Medical & Health Sciences, vol. 16, no. 04, June 2022, p. 1013, doi:10.53350/pjmhs221641013.