Soontrapa S, Soontrapa S, Chailurkit L-O. The Difference in Vitamin D Status between Urban and Rural Elderly Women of Khon Kaen Province, Thailand. SRIMEDJ [internet]. 2013 Nov. 25 [cited 2026 Sep. 17];19(2):67-74. available from: https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/14490