Matangkha, K., Rintra, J., Punyahotara, V., & Sittiprapaporn, P. (2025). Prevalence of Psychiatric Symptoms Associated with Vitamin D Level in Long COVID: Preliminary Study. Greater Mekong Subregion Medical Journal, 5(3), 149–158. retrieved from https://he02.tci-thaijo.org/index.php/gmsmj/article/view/274023