Sittivutworapant, S. “Database analysis to study the main diseases, comorbidities and complications that cost more than DRG of inpatients”. Journal of the Thai Medical Informatics Association, vol. 11, no. 1, June 2025, pp. 25-32, https://he03.tci-thaijo.org/index.php/jtmi/article/view/4434.