Research Article   
            
                        Molecular typing of Mycobacterium tuberculosis isolates from Qinghai province of northwest china by spoligotyping and 15-locus MIRUVNTR 
                        Author(s): Bin Li, ZhaofenWang*, Yongcheng Ma, Haican Liu, Xiuli Shen, Binzhong Ma, Mingxia Jiang, Yuanyuan Zhang, Xiaodong Su, Wenqi Du, Haijing Wang, Xiuqin Zhao and Kanglin Wan