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"FIGF-I." (n.d.). Fullformexpand.com. Retrieved April 20, 2026, from https://www.fullformexpand.com/figf-i/free-insulin-like-growth-factor-i.
FIGF-I. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/figf-i/free-insulin-like-growth-factor-i (Accessed: 20 April 2026).