Association between economic development level and tuberculosis registered incidence in Shandong, China oleh Qian-yun Zhang, Dong-mei Yang, Lin-qing Cao, Jin-yue Liu, Ning-ning Tao, Yi-fan Li, Yao Liu, Wan-mei Song, Ting-ting Xu, Shi-jin Li, Qi-qi An, Si-qi Liu, Lei Gao, Wan-yan Song, Huai-chen Li