Clinical epidemiological survey of gallbladder carcinoma in northwestern China, 2009â2013: 2379 cases in 17 centers oleh Hao-Xin Shen, Hu-Wei Song, Xin-Jian Xu, Zuo-Yi Jiao, Zhen-Yu Ti, Zhao-Yu Li, Bin Ren, Chen Chen, Li Ma, Ya-Ling Zhao, Guan-Jun Zhang, Jian-Cang Ma, Xi-Lin Geng, Xiao-Di Zhang, Jing-Sen Shi, Lin Wang, Zhi-Min Geng