Thamarangsi, Thaksaphon, Payao Phonsuk, Rapeepong Suphanchaimat, & Nattadhanai Rajatanavin. "Analysis of Oxygen Supply and Demand amid the Coronavirus Disease 2019 (COVID-19) Pandemic in Thailand, 2021." OSIR Journal [Online], 14.3 (2021): n. pag. Web. 2 Dec. 2021