Objective To investigate the efficacy and adverse effects of methotrexate(MTX) and Bacille Calmette Guerin-polysaccharide nucleic acid(BCG-PSN) in the treatment of steroid dependent asthma.
目的研究甲氨喋呤（MTX）联用卡介苗多糖核酸（BCG-PSN）治疗激素依赖型哮喘的疗效和安全性。
2
Objective To analyze the reproductive prognosis after treatment of tubal pregnancy with the systemic methotrexate (MTX).
目的总结甲氨蝶呤(MTX)治疗输卵管妊娠后的生殖状态。
3
Objective: to study the effect of treating rheumatoid arthritis (ra) with intraarticular injection of methotrexate (MTX).