Imnamkhao, Siranee, Bhanwasa Jantasin, Chanyawee Chaiwong, Songsuda Muenthaisong, Chonglak Taveekaew, Natthawut Suriya, and Woranart Promsuan. 2023. “Lessons Learned from the Tertiary Health Service Systems during Critical COVID-19 Pandemic in the Northeast of Thailand”. Journal of Health Systems Research 17 (3). Nonthaburi, Thailand:473-89. https://he04.tci-thaijo.org/index.php/j_hsr/article/view/2755.