Sriphumpruk, Wikanda, Doungrut Wattanakitkrilert, and Vishuda Charoenkitkarn. “The Influence of Fatigue, Health Literacy, Depression, and Polypharmacy on Risk Behaviors of Drug-Related Problems in Patients with Heart Failure”. Nursing Science Journal of Thailand 34, no. 2 (June 30, 2016): 83–93. accessed April 16, 2025. https://he02.tci-thaijo.org/index.php/ns/article/view/77305.