Observation of the efficacy of tocilizumab in combination with methotrexate for the treatment of refractory rheumatoid arthritis
SUN Fang-fang, YE Shuang
上海交通大学学报（医学版） . 2016, (11): 1640 .  DOI: 10.3969/j.issn.1674-8115.2016.11.020