Pan, Y., J. Yan, X. Lin, W. Luo, Q. Huang, C. Lin, and W. Lu. “Prevalence and Correlation Analysis Between Post-Traumatic Stress Disorder and Analgesic Use in Survivors of ICU in China”. Journal of the Pakistan Medical Association, vol. 73, no. 9, Aug. 2023, pp. 1811-5, doi:10.47391/JPMA.7194.