Chaichompoo, Rattiya, Ampaporn Namvongprom, Nam-oy Pakdevong, Benjamas Preechakoon, and Thitinan Ounlam. “Relationship between Symptom Severity and Distress in Patients with Advanced Cancer”. NU Journal of Nursing and Health Sciences 13, no. 4 (December 26, 2019): 107–120. accessed October 4, 2026. https://he01.tci-thaijo.org/index.php/NurseNu/article/view/215437.