CJCP     2003 5 (6):  545-547    ISSN: 1008-8830  CN: 43-1301/R Etiology of hospital acquired pneumonia in children HAN Xiao-Hua, YUAN Zhuang, ZHAO Shu-Qin, LIU Chun-Feng, ZHANG Zhi-Jie, LIU Yong Received: null  Revised: null  Online: null Supporting info