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"CHK." Fullformexpand.com, https://www.fullformexpand.com/chk/793534. Accessed 23 Jan. 2026.
Fullformexpand.com, 2026. "CHK." Accessed January 23, 2026. https://www.fullformexpand.com/chk/793534.
"CHK." (n.d.). Fullformexpand.com. Retrieved January 23, 2026, from https://www.fullformexpand.com/chk/793534.
CHK. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/chk/793534 (Accessed: 23 January 2026).