Chai, C. ., X. Liu, and Y. . Zhao. “The Effect of Different Solutions in Tracheal Suctioning on the Incidence of Pneumonia in Patients on the Ventilator”. Cellular and Molecular Biology, vol. 68, no. 2, Feb. 2022, pp. 197-02, doi:10.14715/cmb/2022.68.2.28.