Lekhooa, M., Walubo, A., Du Plessis, J. J., & Matsabisa, M. G. (2012). Evaluation of Traditional Medicines III: The Mechanism of Immune Modulation by PHELA. African Journal of Traditional, Complementary and Alternative Medicines, 9(3S), 47–63. Retrieved from https://athmsi.org/journals/index.php/ajtcam/article/view/1493