Rapid detection of Acinetobacter baumannii and molecular epidemiology of carbapenem-resistant A.baumannii in two comprehensive hospitals of Beijing, China oleh Puyuan eLi, Wen kai eNiu, Huan eLi, Hong eLei, Wei eLiu, Xiangna eZhao, Leijing eGuo, Dayang eZou, Xin eYuan, Huiying eLiu, Jing eYuan, Changqing eBai