CJCP     2005 7 (1):  34-38    ISSN: 1008-8830  CN: 43-1301/R Drug resistance of extended spectrum beta-lactamase-producing bacteria and risk factors for this bacteria infection in children with hospital acquired pneumonia HAN Xiao-Hua, DU Yue, LIU Yong, LIU Chun-Feng, SHANG Yun-Xiao, YUAN Zhuang Department of Pediatrics，Second Affiliated Hospital，China Medical University，Shengyang 110004，China Received: null  Revised: null  Online: null Supporting info