Islam, Fahad, et al. “Survival Trends, Determinants of Mortality, and the Impact of Advance Directives: An Observational Study from the Pakistan Registry of Intensive Care”. Pakistan Armed Forces Medical Journal, vol. 76, no. 1, Feb. 2026, pp. 69-78, https://doi.org/10.51253/pafmj.v76i1.12721.