Presence of <it>qnr </it>gene in <it>Escherichia coli </it>and <it>Klebsiella pneumoniae </it>resistant to ciprofloxacin isolated from pediatric patients in China oleh Wang Chuanqing, Zhang Hong, Deng Qiulian, Ding Hui, Deng Li, Chen Yuan, Wang Yi, Lu Quan, Yang Yonghong, Wang Aihua, Liu Lan, Xu Xiwei, Wang Li, Shen Xuzhuang