R. Hartono, B. Wirjatmadi, and Y. P. Dachlan, “Effect of Symbiotic Supplementation to the Immune Response Ifn-? and Il-2 on Elderly”, IJSBAR, vol. 30, no. 2, pp. 103–111, Oct. 2016, Accessed: Sep. 13, 2025. [Online]. Available: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/6487