Mahdi, Faez A., Ali Sh. Saadoon, and Hassan S. Haider. 2014. “Prevalence and Antibacterial Resistance of Gram Negative Bacteria Causing Respiratory Tract Infection In Critically Ill Patients”. Journal of the Faculty of Medicine Baghdad 56 (3): 273-77. https://doi.org/10.32007/jfacmedbagdad.563496.