Yutrirak, Kantanut, Woraphat Ratta-apha, Pittaya Dankulchai, and Panate Pukrittayakamee. “Psychometric Properties of the PHQ-9, HADS, and CES-D Questionnaires and the Prevalence of Depression in Patients with Cancer Receiving Radiotherapy”. Siriraj Medical Journal 73, no. 12 (December 1, 2021): 793–800. accessed March 31, 2025. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/254587.