Genotypic diversity analysis of Mycobacterium tuberculosis strains collected from Beijing in 2009, using spoligotyping and VNTR typing. oleh Yi Liu, Miao Tian, Xueke Wang, Rongrong Wei, Qing Xing, Tizhuang Ma, Xiaoying Jiang, Wensheng Li, Zhiguo Zhang, Yu Xue, Xuxia Zhang, Wei Wang, Tao Wang, Feng Hong, Junjie Zhang, Sumin Wang, Chuanyou Li