Soontrapa, S., Soontrapa, S., Somboonporn, C. and Somboonporn, W. (2013) “Vitamin D Deficiency and the Risk of Osteoporosis in Elderly Women”, Srinagarind Medical Journal, 17(3), pp. 154–159. Available at: https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/14562 (Accessed: 22 January 2022).