Alipour N, Manouchehrian N, Sanatkar M, Mohammadi Poor Anvari H, Sanie Jahromi MS. Evaluation of the Effect of Open and Closed Tracheal Suction on the Incidence of Ventilator Associated Pneumonia in Patients Admitted in the Intensive Care Unit. Arch Anesth & Crit Care. 2016;2(2):193-196.