Wannajak, K., Leethongdissakul, S. and Hirunwatthanakul, P. (2023) “Health service development model to reduce waiting time in out-patient department at Namon Hospital, Kalasin Province”, UBRU Journal for Public Health Research, 12(3), pp. 82–91. available at: https://he02.tci-thaijo.org/index.php/ubruphjou/article/view/264795 (accessed: 10 October 2026).