Bunyaphatkun, P., Manomaipiboon, A., Trakarnvanich, T., Pupipatpab, S., Chomdee, P., Chitsomkasem, A. and Apichatbutr, Y. 2021. Provider Satisfaction with the VJR-NMU-N99 Half-Piece Respirator to Prevent Coronavirus Disease-2019. Vajira Medical Journal : Journal of Urban Medicine. 65, 5 (Oct. 2021), 387–398. DOI:https://doi.org/10.14456/vmj.2021.37.