2Arabi Y,Al-Shirawi N,Memish z. Ventilator-associated pneumonia in adults in developing countries:a systematic review[J].International Journal of Infectious Diseases,2008,(05):505-512.doi:10.1016/j.ijid.2008.02.010.
3Rosenberg M,Septon l,Eli l. Halitosis measurements by an industrial sulphide monitor[J].Journal of Periodontology,1991,(05):487-489.