5Mohri Y,Tonouchi H, Miki C ,et al. Incidence and risk factors for hospital - acquired pneumonia after surgery for gastric cancer: Results of prospective surveillance [ J ]. World J Surg, 2008,32 ( 6 ) : 1045 - 1050.
6Kieninger AN, Lipsett PA. Hospital -acquired pneumonia: Pathophysiology,diagnosis, and treatment [ J ]. Surg Clin North Ant, 2009,89 (2) :439 -461.
7Torres A, Ewig S, Lode H,et al. Hospital - acquired pneumonia in Europe [ J ]. Eur Respir J,2009,33 (5) :951 - 952.
