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"PDE5." Fullformexpand.com, https://www.fullformexpand.com/pde5/phosphodiesterase-type-5. Accessed 13 Apr. 2026.
Fullformexpand.com, 2026. "PDE5." Accessed April 13, 2026. https://www.fullformexpand.com/pde5/phosphodiesterase-type-5.
"PDE5." (n.d.). Fullformexpand.com. Retrieved April 13, 2026, from https://www.fullformexpand.com/pde5/phosphodiesterase-type-5.
PDE5. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/pde5/phosphodiesterase-type-5 (Accessed: 13 April 2026).