Tangwiwat, Pimolphan, Titiporn Tuangrattananon, Wanchanok Limchumroon, Benjawan Ingthom, Chompoonut Topothai, and Thitikorn Topothai. 2024. “Severity and Associated Factors of COVID-19 Infection among Pregnant and Postpartum Women: A Cross-Sectional Study in Thailand”. Journal of Health Systems Research 18 (2). Nonthaburi, Thailand:251-63. https://he04.tci-thaijo.org/index.php/j_hsr/article/view/1478.