Shuhan Yu et al. 2025. Construction and validation of prognostic nomogram model for primary malignant cardiac tumours based on SEER database: A retrospective study. Journal of the Pakistan Medical Association. 75, 7 (July) (Supple-02) (Oct. 2025), S-72-S-78. DOI:https://doi.org/10.47391/JPMA.SRPH-12.