Uhttamangkapong, Sarayuth, Veena Bhakdisirivichai, and Nipat Poonsawat. “Infectiou Diseases in Pyrexia of Unknown Origin Patients in Community Hospitals in Public Health Region 1, 2004”. Journal of Health Science of Thailand 15, no. 1 (May 25, 2019): 141–149. Accessed December 5, 2025. https://thaidj.org/index.php/JHS/article/view/6725.