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Fullformexpand.com, 2026. "O-T-C." Accessed April 4, 2026. https://www.fullformexpand.com/o-t-c/over-the-counter.
"O-T-C." (n.d.). Fullformexpand.com. Retrieved April 4, 2026, from https://www.fullformexpand.com/o-t-c/over-the-counter.
O-T-C. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/o-t-c/over-the-counter (Accessed: 4 April 2026).