El-Sherbiny, E. M. ., Osman, H. F. ., & Taha, M. S. . (2021). Effectiveness of Echinacea purpurea extract on immune deficiency induced by azathioprine in male albino rats. Bioscience Journal, 37, e37029. https://doi.org/10.14393/BJ-v37n0a2021-51270