The clinical efficacy and safety of tofacitinib for difficult ⁃ to ⁃ treat rheumatoid arthritis：A retrospective case study

ZHANG Juan, YU Yakun, TIAN Jingjing, HUANG Yichen, DUO Ruixue, SHEN Haili.
The Journal of Practical Medicine . 2022, (8): 1006 -1011 .  DOI: 10.3969/j.issn.1006⁃5725.2022.08.018