Amri, L. F., H. . Sasmita, and M. . Muchtar. “Anxiety Levels and Associated Factors Among Elderly Patients With Cardiovascular Diseases: A Mixed-Methods Study”. MEDICA (International Medical Scientific Journal), vol. 8, no. 2, Feb. 2026, pp. 37-46, doi:10.53770/medica.v8i2.881.