Maleelai, Kaewjai, Pridaporn Rittiron, and Nichaphat Phudket. 2024. “Factors Related to Self-Protection Behavior COVID-19 Among the Elderly With Diabetes and Hypertension, Det Udom District, Ubon Ratchathani Province”. Journal of Health Science of Thailand 33 (Supplement 2):S233-S243. https://thaidj.org/index.php/JHS/article/view/15964.