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Fullformexpand.com, 2026. "IGEN." Accessed January 15, 2026. https://www.fullformexpand.com/igen/623552.
"IGEN." (n.d.). Fullformexpand.com. Retrieved January 15, 2026, from https://www.fullformexpand.com/igen/623552.
IGEN. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/igen/623552 (Accessed: 15 January 2026).