Shah Qasim, Xu-Ying Li, Tao Wei, Khalid Khan, Qaisar Khan. “Postoperative Delirium (POD) in Cancer Patients Its Incidence and Risk Factors a Prospective Observational Study”. Pakistan Journal of Medical & Health Sciences, vol. 16, no. 05, Aug. 2022, p. 1591, doi:10.53350/pjmhs221651591.