Xanthine oxidase activity in thiopurine curative Chinese inflammatory bowel disease patients oleh Liang Ding, Fang‐bin Zhang, Hui Liu, Xiang Gao, Hui‐chang Bi, Ling Huang, Xue‐ding Wang, Bai‐li Chen, Yu Zhang, Chuanzhu Lv, Pin‐jin Hu, Min Huang