Ekpreechakul, T., W. . Saiphiroonthong,MD, W. . Chaiwong, and C. . Kunanusont, MD, PhD. “Quantitative Fit Tests of Selected Respirators for Health Care Workers Caring for Patients With Confirmed or Suspected COVID-19”. The Bangkok Medical Journal, vol. 16, no. 2, Sept. 2020, p. 196, doi:10.31524/bkkmedj.2020.21.013.