Issaragraisin, Thitapa, and Jirapa Champaiboon. “Pulmonary rehabilitation for critically ill elderly patients with COVID-19 in Thailand: Two case reports”. Chulalongkorn Medical Journal 67, no. 3 (July 1, 2023). accessed April 17, 2025. https://he05.tci-thaijo.org/index.php/CMJ/article/view/30.