Phoolawan, P., Nipaporn Chanamarn and Jiraporn Jumpajan 2024. Effect of smartphone applications on reducing the pain of office syndrome among staff at Sakon Nakhon Rajabhat University: a quasi-experimental design: 10.55131/jphd/2024/220306. Journal of Public Health and Development. 22, 3 (Sep. 2024), 61–72. DOI:https://doi.org/10.55131/jphd/2024/220306.