Tawfiq, Narmen Badri, and Mustafa Flayyih Abdulrdha. “Impact of Preoperative Risk Factors Upon Duration of Intubation for Cardiosurgery Patients in Ibn-Al-Bettarcenter”. Kufa Journal for Nursing Sciences, vol. 5, no. 2, Aug. 2015, pp. 141-9, doi:10.36321/kjns.vi20152.2597.