X. Y. Yong, C. F. Sui, M. Y. Liew, T. W. S. Chong, and J. Y. Liew, “Psychological Distress Screening for Depression, Anxiety and Stress among Medical Ward Patients in Hospital Tapah, Malaysia: A Cross-Sectional Study Using The Depression, Anxiety and Stress Scale (DASS-21)”, J Health Sci Med Res, vol. 40, no. 3, pp. 317–333, Sep. 2021.