Noorifard, Mahtab, Ramin Hamidi Farahani, and Ebrahim Hazrati. 2020. “The Incidence of Ventilator Associated Pneumonia and Risk Factors in ICU”. Acta Medica Iranica 58 (9), 439-44. https://acta.tums.ac.ir/index.php/acta/article/view/8309.