P. Prempree, “SARS-CoV-2 Clearance from Andrographis paniculata, Boesenbergia rotunda, and Favipiravir among Mild COVID-19 Cases in Klong Prem Central Prison during Mid-2021: a Retrospective Study”, OSIR, vol. 15, no. 4, pp. 131–137, Dec. 2022.