Silawan, T., Ninkarnjanakun, N., Ponsen, K., & Ouayswat, M. (2019). Health threats and risk behaviors of the elderly in the semi-urban communities of Sung Noen District, Nakhon Ratchasima Province : Comparison between males and females. Thai Journal of Health Education, 42(2), 99–109. retrieved from https://he01.tci-thaijo.org/index.php/muhed/article/view/217250