Yodying, W., A. Siripitayakunkit, B. Sumdeangrit, and S. Puwanant. “Symptom cluster management strategies and outcomes in patients with heart failure”. Chulalongkorn Medical Journal, vol. 65, no. 4, Oct. 2021, https://he05.tci-thaijo.org/index.php/CMJ/article/view/1085.