Sarakarn, P., and D. Jumparway. “Overview of longitudinal data, limitations, and appropriate alternatives of statistical methods: Longitudinal data analysis in health science research”. Journal of Medicine and Health Sciences, vol. 28, no. 1, Apr. 2021, pp. 184-97, https://he01.tci-thaijo.org/index.php/jmhs/article/view/249204.