R Maude, Rapeephan, Siriwan Tangjitgamol, Kasem Sirithanakul, Yanisa Duangduen, and Natapon Ativanichayapong. “Prevalence, Symptoms, and Associated Factors of Long COVID-19: A Cross-Sectional Survey Study: Long COVID-19 Conditions and Symptoms”. Vajira Medical Journal : Journal of Urban Medicine 69, no. 4 (July 8, 2025): e273464. accessed September 18, 2026. https://he02.tci-thaijo.org/index.php/VMED/article/view/273464.