Somsorn, S. “The Prevalence and Factor Associated of Latent Tuberculosis Infection Among Healthcare Personnel in Health Region 4, 2021”. Journal of the Office of Disease Prevention and Control 9 Nakhon Ratchasima, vol. 29, no. 2, May 2023, pp. 16-24, https://he02.tci-thaijo.org/index.php/ODPC9/article/view/259407.