Udomdechawet, Kittiwat, Ratchadaporn Ungchaoren, Nuntana Promnit, Chamaiporn Yuntapun, Natthida Sutthiphai, and Oraya Sahat. 2024. “Factors associated with COVID-19 mortality in the Nakhon Phanom Province population: a retrospective cohort study”. Journal of Public Health and Health Sciences Research 6 (1):93-105. https://he01.tci-thaijo.org/index.php/JPHSR/article/view/263309.