Janngarm, P. and Sangketchon , C. 2021. Comparison of The Emergency Department Length of Stay Before and After Using the Vajira Hospital Asthmatic Care Guidelines. Vajira Medical Journal : Journal of Urban Medicine. 65, 6 (Dec. 2021), 469–478. DOI:https://doi.org/10.14456/10.14456/vmj.2021.44.