Fullformexpand.com, 2026. "PPNH." Accessed February 25, 2026. https://www.fullformexpand.com/ppnh/posterior-periventricular-nodular-heterotopias.
"PPNH." (n.d.). Fullformexpand.com. Retrieved February 25, 2026, from https://www.fullformexpand.com/ppnh/posterior-periventricular-nodular-heterotopias.
PPNH. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/ppnh/posterior-periventricular-nodular-heterotopias (Accessed: 25 February 2026).