Lv, Q., Zhang, W., Shi, Q., Zheng, W., Li, X., Chen, H., Wu, Q., Jiang, W., Li, H., Gong, L., Wei, W., Liu, H., Liu, A., Jin, H., Wang, J., Liu, X., Li, Z., Liu, B., Shen, M., Wang, Q., Wu, X., Liang, D., Yin, Y., Fei, Y., Su, J., Zhao, L., Jiang, Y., Li, J., Tang, F., Zhang, F., Lipsky, P. E., & Zhang, X. (2015). comparison of Tripterygium wilfordii Hook F with methotrexate in the treatment of active rheumatoid arthritis (TRIFRA): a randomised, controlled clinical trial. Annals of the rheumatic diseases, 74(6), 1078–1086. http://access.bl.uk/ark:/81055/vdc_100135141569.0x000057