Thonguthaisri, Witsanu, Khrongwong Musikatavorn, Paweena Susantitaphong, and Jutamas Saoraya. “Clinical manifestation, investigation, management and outcomes of COVID-19 in emergency departments: a systematic review and meta-analysis”. Thai Journal of Emergency Medicine 4, no. 1 (July 6, 2022): 52–84. accessed September 18, 2026. https://he02.tci-thaijo.org/index.php/TJEM/article/view/256901.