Chaiyodsilp S, Pureekul T, Srisuk Y, Euathanikkanon C. A Cross Section Study of Vitamin D levels in Thai Office Workers. BKK Med J [internet]. 2015 Feb. 20 [cited 2026 Sep. 20];9(1):8. available from: https://he02.tci-thaijo.org/index.php/bkkmedj/article/view/220593